Masterbation

Hello, I’m 11 weeks 6 days today and had a little self love this morning. After I finished I noticed my uterus was really tight and felt like a hard bump. I’m totally freaking out now that something is wrong, is that normal?? My husband I have refrained from anything sexual since I found out I was pregnant, then I developed an SCH and put on pelvic rest, but on Monday mu dr said that had healed up and we could have sex again. I wanted to test the waters today to see how I felt and now I just feel like something is wrong :/