I had surgical abortion done on 20th February 2018 the same night I had sex with my boyfriend but he didn’t cum inside, I had been experiencing spotting a here and there for a week and the spottings stopped, it’s now 21st March and I still haven’t gotten

Maybe you shouldn't be having unprotected sex since you clearly aren't ready to have a baby.

Hello Anon

Yes, it's possible to get pregnant right after an abortion although an abortion can also temporarily change the menstrual cycle. A pregnancy test would be accurate by now so a test is a good idea.
Susan