No sex this month but period doesn’t come

I’m new to this topic girls please help me.

Why is my period not coming if i haven’t had sex since 6 weeks and after that my period came on time.. it was heavy as always So i know it wasn’t spotting.

I also may add that i’ve took 2 plan b’s in 4 months distance. Last plan b was in june.

But now Even if i haven’t had sex after my period came last month, i just got sore breasts, some cravings and mood swings for 1 week! But No period.

It’s irregular and it usually comes after 3 weeks and some days. But now it’s Been almost a month!! What’s happening? Am i too paranoid?

Can i be pregnant if my period came?

Why is this period not coming Even if i haven’t had sex after my period came last month !!?? Help me im Drowning in anxiety😭😭