Pregnant after Abortion?

Bay

Is it possible to get pregnant again 2 months after an abortion? My boobs are rounder and hurt and weirdly my feet are tingling and my hands feel cold and feeling a lil sea sick! I tested a week ago it was neg but I had sex with my now ex bc he broke up with me last night on xmas so many times so I’m just so confused! Is it possible also to get a neg than a positive a week later? Confused!