Hello I Have A Few Questions. I Hope U Can

hello i have a few questions. i hope u can help, i have been experiencing some weird feelings in my stomach and idk if its a bad case of gas or what, but anyway i dont know if i am pregnant or not because ive taken several ept but thats was about march/april or 2016 , and i also have had what i would assume to be periods. My periods tho have been a bit odd tho, im already an irregular type and i usually last 3/4 days ... but lately ive been vomitting everytime i come on, the first day && it only last for 2/3 months ... my dr appointment isnt until monday ... could there be a possibility??? also my bestfriend & i both witnessed movement, but im not sure && i belch alot rather i ate drank or not if that helps