advice!

so I recently broke up with my ex because we were always fighting and I felt like he was cheating. and 4 days later he is posting a new girl in his Instagram bio something he never did with me. he made me look stupid and I gave my all to give during that year. i lost my virginity. I know I have to move on but there is a problem I might be pregnant because I was fertile and didn't use condom because he doesn't like to. I know I was stupid. I messaged him that my pregnancy test was a light + and he never replied he didn't even take the other girls name off his bio. I'm so hurt