Righty Tighty

I went in for my follicle check today and there was one nice size on the right. So I got the hcg shot to hopefully release it. The nurses are nice and a little superstitious. Last month I had the follicle on the left and got the shot on the left hip and this time its on the right so they gave it to me on the right. I hope it works.

So my question is what is a nice size? I tried to google it but cant come up with a definite answer. The tech said they like to see anything over 2.0 cm (20mm) and mine was 2.9 cm (29mm). I am worried over the fact that it was so big on cd 13 and that it hadnt released on its own. I hope I release it otherwise I will have a nice big cyst to deal with.

Gotta go back next week for progestrone bloodwork.

ETA: I am concerned about the size of my follicles, and the timing of my HCG shot. How big should my lead follicle be before I take my HCG shot?
A lead follicle should be at least 16 mm on an hMG like Pergonal, it should be at least 18 mm on a recombinant FSH like Gonal-F, and should be about 22 mm on Clomid. Occasionally Gonal-F can produce mature eggs in smaller follicles, in which case other measurements such as E2 and progesterone should be used to indicate maturity. (The difference in ideal size is due to the difference in mechanisms by which the medications work. For example, the mechanism by which Clomid works often takes a bit longer because it is indirect. Therefore, the follicle has more time to grow before the egg is actually mature).