Light period? Need advice..

I’ve been on combination birth control pills, Junel-Fe, for almost a year now. Me and my boyfriend are sexually active and on top of the pill we use condoms every time.

This month though my period was not like it usually is. It was all dark brown blood and I passed some tissue/clots. It was very light and only lasted 2 days. Usually my periods last 4-5 days and are pretty heavy. I’ve been having some symptoms lately like sore boobs and a weird sore feeling down there. Could I pregnant? I tend to worry a lot/overthink. I have been convincing myself I am pregnant and have been checking my belly out of worry to see if anything has changing. I am not trying to have a baby right now. I overthink everything even though I am aware of the success rates of both contraceptive methods. I don’t know who to turn to since my friends think I’m stupid for even thinking I’m pregnant.. Any advice would be appreciated! Thanks!