Quick question..

Aight so I’ve been on the pill for almost 6 months and my boyfriend and I just recently had a couple rounds of unprotected sex. After around 2 weeks, I didn’t get my period during my sugar pills. 2 days after they ended, I took a pregnancy test and it was a strong negative. Almost around 15 days, I still haven’t bled. Should I be worried?

Update

I did start another pack of pills and haven’t taken another test