13 days out and I feel very, very weak

That happen to me at like week two. I have a blood pressure monitor at home. My bp was low. I was on bp pills and quit. Talk to your dr if you think it could be that.

Just seen our doc today, he said I was mildly dehydrated and to drink Pedialyte.  I just got the unflavored so I can mix it in with Crystal Light.  I can now eat normal meals, go back to work and work out.  I think once you start eating more foods you will start feeling better.  Diane from office is having the Sleeve done in the morning. She is a little scared but knows it will be just fine.  Hope you feel better soon.