Can I still be pregnant?

So on the 6th of this month ovulated the 7th I had unprotected sex and he pulled out but he pulled out and I know precum could still get you pregnant, today is the 21st and I got af and the cramps are there and the bleeding is normal first day but yesterday I was spotting brown discharge with no cramps but 5 days prior I had small managed cramps on my right side lower stomach and I have been very emotional. I took a test 3 days before af and got a negative , but can I still Be pregnant? And have my period? I️ wouldn’t mind having a baby and i kinda want one