Anyone else have bleeding? Was it ok?

I had spotting for a few days and now bleeding. I am only 4.5 weeks. My nurse was super kind and comforting, saying it could be nothing, but im worried. I did get blood drawn today. Has anyone had bleeding and still had a successful pregnancy. Its not heavy like a period, but i did need a liner today. I had a medicated <a href="https://glowing.com/glow-fertility-program">IUI</a>