Pregnant?

Last time i got what i think is my period. Was the 20th - 23rd of march. Which is 4 days. According to my notes it was medium to light. I haven’t got my period since but i still have symptoms of it. I took a pregnancy test but came out negative but it could also be because of low hormones or because its was a cheap one.

Could the period be spotting? Because the last time we had unprotected sex was a week before it. And i have been feeling alot of symptoms like cramping and such.

Anyone experienced this ? If so what was your out come?