First IUI—need help

Hi all. I had my first <a href="https://glowing.com/glow-fertility-program">IUI</a> cycle this past Friday, making this day 3 post <a href="https://glowing.com/glow-fertility-program">IUI</a>. I have been having mild cramping since the procedure (normal, I know) and then today began spotting. I haven’t filled a pad, but it definitely became heavier the more I moved about. It started pink and brown then became frank red. I had a glob if red come out and every pee I have had since, has been thin and bright red. It’s too early for implantation and a week early for my period. Confused, nervous and trying (and failing) to not overthink this. Anybody have any ideas or past experiences? Help!

Edit: no meds taken at all for this <a href="https://glowing.com/glow-fertility-program">IUI</a>