It may just be your body getting used to the pill. Nausea especially is a very common side effect of the pill.
I had a very bad experience recently on the pill where I got a lot of pseudopregnancy symptoms even though I was not pregnant. If you get any of those, just quit the pill immediately. I quit over 2 months ago and am still detoxing and getting back to normal. I just write this because you mentioned feeling weird in your post. If you get any of the following symptoms, you should probably stop the pill: huge, massive weight gain quickly (i gained 20 lb. In just over a month), bad water retention and bloating and swelling (feet were so swollen it hurt to walk, could no longer wear my wedding rings), abdomen over uterus becoming hard and bulgy, weird feeling that all the cells of your body are pushing outward, ravenous appetite, strange food cravings, moodiness & huge anxiety, crying at anything (in tears at least once daily & then it would take hours to stop crying). If you get these symptoms, I speak from experience, no they will not get better, they got worse, and maybe 6 months from now, i'll be normal again, I hope...