Help unsure if pregnant

Vicki

So have sex last month and had a period.... this month started what I think is a period... I’ve been on but not my normal heavy flow and now day 3 it seems like it’s stoping and I’ve took a pregnancy test from the dollar store but it said negative... could I still be pregnant ... I keep

hearing ppl say they took tests and they came out negative and turn around and found out later they was.... I definitely need help figure it out 😩😩😩😩