not pregnant & getting sick

Background: have endometriosis, can't have anymore babies, just had surgery 2 weeks ago come Thursday. Still bleeding & discharge from a DNC, ovarian cyst removal & endo surgery. Felt okay after day 3 as far as being comfortable or not then all of a sudden huge cramps, a ton of back pain & radiating back pain & uncomfortable laying down, bending down etc. been very sleepy & just don't feel normal at all. Hormones I would say aren't all over the place because I'm feeling emotional normal, I'm a SAHM & just we have an everyday routine, so it's like normal things going on. But I'm throwing up after certain foods that I eat, milk makes me gag, can't keep down coffee, there's no way in hell im pregnant cause I couldn't have sex for 2 weeks now & nothings comfortable anyways because of healing. So that's not an opition. So any ideas what this could be?!