Cycle Monitoring Update

I went in this morning for my CD12 ultrasound, and I was actually surprised. My 3 little follicles from yesterday grew into mature ones. I also have 2 little ones. The 3 mature ones grew 3 mm in one day. Today they were 19, 17, 16. The two smaller ones were 13 and 12. Even though I'm happy about my 3 mature follicles, I am still wondering if I didn't respond as well as I should have to the Gonal-F. When I told my doctor I didn't think the Gonal-F was working he asked me if I wanted dynamite lol. He also asked me what I thought about having twins. I never thought I would hear him say the word twins.  All I want is one healthy baby. I will be going in tomorrow to check on my follicles again. My RE said that I should be ready to trigger tomorrow, and then have my IUI's on Monday and Tuesday. I hope all 3 mature follicles will still be there. I hopefully took my last shot of Gonal-F tonight. I'm sick of needles in my stomach. My husband gives them to me every night. He's the best!