Do I need to Test?

I just got back on birth control about a week ago but have been having weird symptoms for a couple months. I have been weird heart burn and nausea at weird times. My stomach is bloated even though I'm drinking lots of water and ovulating, which makes my stomach really flat usually. I still have my period but it's usually late and light. I work in the medical field as well so I know this could be lots of things...ideas?