Intercourse during pregnancy

Amber
Looking for some help as this is my first pregnancy. I will be 6 weeks on Monday. Today was the first day hubby and I have been intimate since finding out we are expecting. 2 things happened that scared the crap out of me. 1. After climaxing I had some moderate cramping in my uterus. Lasted for about 5 min. But definitely noticeable. 2. About 6 hours later I noticed some spotting when I went to the bathroom. I haven't had my first scan yet so I have no idea if everything is in its right place and all good. I have terrible anxieties. We were ttc for 5+ years and were finally successful after almost a year with a clinic and our 3rd <a href="https://glowing.com/glow-fertility-program">IUI</a>. Hoping you ladies can put my mind at ease. TIA