Excited and scared IUI

So I’m super excited, but extremely scared I tested positive ovulation, and I scheduled my IUI tomorrow and this will be our first round. Hubby and I have been trying for over 4 years and due to “unexplained infertility” (my Diagnosis) we need medical assistance to conceive. I’m scared of the fact that even with the medical assistance it’s still only a 31.1% success rate. Am I just being crazy? My Dr.s tell me everything looks textbook and I produced 2 follicles like they were intending me to. I didn’t have to inject myself with the shot I  ovulated on my own and even get to jump my scheduled appointment time. Am I just overthinking things? Send me all the baby dust. And anyone that had a IUI please let me know how it went, how did you feel post IUI, and what to expect. My Dr.s tell me but I want to hear from “the real world”

Thanks so much everyone!