If you have been to a fertility clinic please comment

So I already had my first day last month had a lot of blood work done and tomorrow I will go back to have an ultrasound done I’m on my period day 3 today they wanted me back while I was on my period for ultrasound does anyone know why you get an ultrasound while on your period I never actually had it done while on my period ? And then this time my husband will come as well and have a semen analysis done and I already had an HSG done I was confirmed that I have both tubes blocked so that’s why I’m going to a fertility clinic to see if I can get them unblocked 🙏