So tired of being sick!!

Since thursday I have went from having a cold to being diagnosed with having strep throat, larengitis (sp), and fluid around my ear drums. I was put on amoxicillin for 10 days (they are pills) and I started yesturday afternoon. I now have a full day and half in my system. my stomach feels constently queezy. I have taken amoxcillin before but haven't had this problem..will pregnancy change the way your body excepts meds? I guess this might be a pregnancy issue but its still a health thing too right? Im not good at picking catagories.