Pregnancy Scare..?

Hi everyone. I had protected sex with my bf several times last cycle. Nothing broke. I started what I believe is my period a day earlier than normal. I’ve had cramps, bloating, and sore boobs (all normal for me) but it seems that my period is already dying down ? I work outside all day long from 8am-5pm and this week it has been super hot so my water intake has increased. Is this all normal ?? The blood has been ranging in color from this to bright red. Thanks!