Egg retrieval was today

Cara

I had my egg retrieval this morning. During my last ultrasound on Wednesday, they were seeing 48 follicles. Cause of that I had to do the Lupron trigger instead of HCG. This morning they told me they retrieved 18. So I’m wondering were the other 30 just too immature at that time? Also I’m at high risk for OHSS so I’m chugging Gatorade like crazy. I really want to do a fresh transfer but my RE said we may have to do a frozen. Anyone have similar experience??