Help me!!!

St

OK so I did my first <a href="https://glowing.com/glow-fertility-program">IUI</a> since my miscarriage 12 days ago...I have a beta on Tuesday at day 15 but my hubby is going nuts waiting I am wondering if I should take a HPT. I did take letrozole but I did not have to do a trigger shot, I ovulated naturally. Usually my periods are only 21 day cycles so I'm the past I would have had a late period but with the miscarriage in June I don't know if my cycles are 100% normal again. Should I take a HPT or should I wait it out until Tuesday (the appt is in the evening so might not get the results until Wednesday morning.) I don't want to test to early and get a bfn and get discouraged when it was just because I'm impatient.