I Had Protected Sex In September 20 And I Got

I had protected sex in September 20 and I got my period around October 3 and ended October 7 and it appeared lighter (he used a condom). It's now November 3 and I got my period but it's super light now and not as heavy. Is it possible that i'm pregnant? I've been moodier than usual and have small cramps when I usually get bad cramps. I'm also irregular so I don't know if that's the reason? I don't want to have a child anytime soon!!