3.5 weeks post MC pain n spotting

I’m am 3.5 weeks post MC. Yesterday I started barely spotting bright red only when I wiped the same today accept when I pee my left side hurts so bad and it goes across my stomach horrible shooting pain even when I have to poop it’s agamizing pain. I have a pretty high pain tolerance so I haven’t went to er yet. But I’m still just barely spotting and when I sitting it’s a constant sharp pain in my left side and if I start moving around it is more of stabbing pain. I thought maybe a cyst. I’ve had 3 before but with both I was throwing up and had a fever I have neither right now. I’m just wondering if this has happened to anyone. Also to a first response BFN. And couple cheap test BFP too.