Could I be pregnant or is it the pill?

I recently decided to stop taking the pill as it was messing with my body too much. My partner and I have had unprotected sex 4 times since I stopped taking the pill. Its the first month ive not taken my pill and I shouldve started my period 2 days ago and im not even getting cramps. I took a test and its negative and its been 8 days since we last had sex. Could I be pregnant or could it be the fact that im not on the pill?

Has anyone else had delayed periods after stopping taking the pill??