In my case it would have to be the weight, I'm only 33 and my knees and feet are starting to have problems.

I think 17 is very young for a D&C.  I have never had a regular period, except for when I was birth control when I was 14.  (I went on it to regulate my period.)  I have never had a D&C even though I only get only 3-4 periods a year.  Even when I went to see my doctor about endometriosis, they didn't recommend a D&C.  The only time I was recommended to have a D&C was when my doctor thought I might have uterine cancer and they were having trouble getting enough tissue to test from the uterine biopsies.  Of course, when I went to a second doctor, she informed me that a D&C was unnecessary.  Then I was confused, so I went to get a third opinion, who also told me that a D&C was unnecessary and that it is a "serious procedure" that shouldn't be done unnecessarily.   

Based on my research of D&Cs, I can't see a reason to get a D&C that young unless she has an immediate problem that is causing her pain or another potentially serious health problem.  My recommendation would be to definitely take her to get a second opinion.  I would hesitate to have her go through that unless you get another ob/gyn (unrelated to the first one) that says she needs it.   

It is probably a combination of PCOS and poor eating choices.  The poor eating choices are probably causing insulin overload and your insulin resistance is helping you gain weight.  Below, I included a *very* simplied explanation of how insulin resistance in PCOS may be making you gain weight.  I would suggesting going back on your glucophage.  (Fyi:  My PCP put me back on Fortamet (the extended release version of glucophage) after surgery.)   

In a "normal" body, here’s what happens: 

(1)   When you eat a meal, whether it is steak, fish or vegetables, the body breaks it down into a usable energy form, namely glucose. 

(2)   Insulin then carries glucose across the cells’ membranes so the glucose can be broken down into energy in the cells. 

In an insulin resistant body (i.e., in most women with PCOS), here’s what happens:  

(1)   As with the normal person, the body breaks down food into a usable energy form. 

(2)   When you are insulin resistant, your cells don't allow the insulin to cross the membrane like they should, which means that the insulin cannot take the glucose in the cells.    (3) The excessive amounts of free-floating glucose remain in the blood stream, until it is sent to the liver, which converts it to excess body fat.
  (4)   Additionally, because your body recognizes that there is glucose that needs to be transferred to the cells, your pancreas thinks the reason the insulin is not carrying the glucose to the cells is because you don't have enough insulin in your body.  As a result, the pancreas dumps more insulin into the blood stream. 

Here is why glucophage is important.  Glucophage appears to work in three ways:
(1) It decreases the absorption of dietary carbohydrates through the intestines.

(2) It reduces the production of glucose by the liver. The liver uses the raw material in your food to create a reserve supply of blood sugar. When your body experiences stress, the liver releases the reserve glucose to supply your brain and muscles with an immediate source of energy to cope with the stress.  Glucophage suppresses the production of this reserve fuel.

(3) (erhaps most importantly) Glucophage fights insulin resistance, by increasing the sensitivity of muscle cells to insulin. Glucophage helps your body to transport glucose with relatively less insulin, thus lowering your insulin levels.   

You may want to check the PCOS website soulcysters.net to see if anyone there has had some success.  I don't think these boards are viewed much, so you may get more info checking out a PCOS specific site. 

As for me, I haven't had any sucess with hair diminishing, but I'm only 6 months out and I've only lost 50 lbs.  I have incredibly dense hair on my chin/neck.  I've tried electrolysis before but its costly, painful, takes a lot of time, and I got dimiishing results.  I am curently doing laser hair removal.  Today was my first treatment.  We did a small test area a few weeks and had good results, so hopefully this will work.   

  I guess I will have the excess facial hair for a long time.  Last night, a doctor friend told me that it will take considerably more than a year for my hormones to balance.
   I do want to try laser treatments down the road and hope that will be the answer.
Thank you.