Relationship argument ?

Ive been with this boy over a year n 5 mnths n wen I say we argue yes we argue okay ! We went to two schools together n we fought well yesterday we had an arguement n he was already pissed off due to wat him n his grandmother had talked about. N as he was walking me Dwn the street he was cursing and talkin nasty to me. He left me down the street walking Wheneva we Hav an argument he decides that he wants to bring my past or whatever bak into my face n I'm suppose to sit their n take it. Now yesterday I walked bak towards him n cursed him out bcuz I've been at the house since 1pm till 6 pm n he hadn't spoken nada. So we went bak into the house n he dnt wanna say all this stuff he said while we was walkin nor to me while in a txt out loud. I decided to go home to the bus stop n I talked to his gmA n she was soo on my side n I wasn't CALLIN for her to be on my side I wanted her to be real but at the end she tell him different n now I'm called every name in the book frm a-z n it's a possibility that I'm pregnant n I hate to knw that. I'm just scared man he says I'm embrassing but wen everyone in the two schools think he beats me! Ugh wat do I do I mean went together right now while I not take him bak?