Any thought?😩

I'm pretty sure some of you guys are receiving my other post so usually my periods are 4 days long but this month it was for 8 days normal 9 days after I stopped my normal. Period I started spotting and I'm going on 7 Days now in after the 5th day I started cramping back pain blood clots which is not normal for my regular periods of course I freaked out and I want to the Urgent Care they ruled out no STDs or UTIs so I've called my regular doctor he wants to do a vaginal ultrasound in a blood pregnancy test remind you I did three pregnancy tests through this whole spotting period And they're all negative I did a ovulation test was very very faint because I should be ovulating tomorrow. So the scary part about this whole thing is I had vaginal polyps in the past where I had to get them surgically removed and so that could be causing the bleeding because the more we have sex the more bleeding I have so I'm hoping with a vaginal ultrasound we don't find no polyps we find a little little bean. Has anybody else had this go on if so please let me know what it was please let me know what you guys think to because I'm stressing about it I'm scared I don't know what to think first time going through all this weird stuff