Pregnancy alert or not?

Goodness

Hi, okay I'll go straight to it.

I had my period on the 31st of March which ended on the 5th of April. My period is always 5days long or shorter but never 6 days. So I had sex with my bf on the 7th, 20th, 21st and 29th of April. Now, I got my period again on the 12th of May which lasted for 6 days also. During my period I never got any signs at all but after my period my boobs got bigger and my nipples are sore asf. Hope I made it clear enough cos I'm confused. Could I be pregnant?