First IUI with PCOS and hypothyroidism

[CKMBJM]

I'm on my way to have a trigger shot for an IUI tomorrow after getting a helluva period out of nowhere with no medical intervention and then taking 7.5 mg femara days 5-9. I had an ultra sound on day 15 (yesterday) and I wasn't expecting much. Nothing ever seems to work and I usually get bad news with ultra sounds. I had literally stopped trying to be optimistic. And she said,  "woah." And told me I have 3 mature, "very good looking" follicles on my right ovary and my IUI would be Friday! It seems my husband's and my chance has finally arrived. This will be our first attempt at an IUI, our first attempt at anything besides natural except provera inducing periods  (which I didn't even have this time) and Femara. After being together almost a decade and never using protection in hopes of getting pregnant, 3 years of marriage and officially trying with no results, 2 diagnoses  (PCOS and hypothyroidism), and watching everyone we know constantly getting pregnant with the endless baby showers and hospital visits, could our dream finally come true? What are the chances of IUI working the first time especially in these circumstances? Should I even bother getting my hopes up? I'm very nervous and if it doesn't work I need to be prepared so I don't completely fall apart afterward. Any success stories with similar situations or advice or encouragement... I'll take anything here. TIA

[CKMBJM]

I'm really nervous and would love some input

[CKMBJM]

Anyone with any thoughts?