Pain in my back. Is this normal?
You definitely need to call your Surgeon or your surgeon's emergency phone line to see what he says to do. He will probably tell you to go to the ER but you want to go to the ER of the hospital that you had your surgery at not, a local hospital if it is a different one than your surgery. It is not normal to have stabbing pains at 2 weeks out, yes some pain at the incisions - you said main incision - are you open or laproscopic? Laproscopic should have many little ones, no main one - and an open one should just have 1 incision, so I am confused about you saying the main incision?
It is common for us to have post op pain on the right side which can be due to the gallbladder but that is usually much further down the road, not 2 weeks and gas pains wouldnt be stabbing. Gallbladder and pancreatitis can both be shooting to the back but they are both on the right side.
The only thing that I can think of on the left side and it really depends on where on the left side - now this has absolutely nothing to do with your incisions though - does it hurt in the front shooting to the back or is it on the left side around the back - in the flank area? If you dont know where the flank area is - it is mid way down your back on the side. If this is what it is, it could be from kidney stones. You would need to go to the ER to have your urine checked for blood and protein as well as a CT scan to check for stones. If this is what it is, it can be absolutely unbearable. Some people can pass them and others have then get stuck in the ureters and that requires a form of surgery via a cystoscopy. I have had 5 of them in the past year and a half.
Either way, you need to get to an ER to find out what is going on