I need help ‼️⁉️

My period has been on for 8 days and it's usually 5, I've been having red then brown blood and cramps in my pelvic area that come and go.. I've been feeling fatigued . I had sex Saturday at 12 am and shortly I started to bleed ... last week I had sex too but I'm on the patch ... I don't think I could be pregnant but something isn't right ...