ALso called an RE. If you m/c 3x and you are 21 there is really no reason for this wrt FSH. As far as I understand it the age is what determines if your eggs are "bad".
Go to an RE and have the work up for recurrent m/c; blood tests and a check of your tubes/uterus to see if there are any reasons why the embryo cannot implant properly.
THere may be a reason for the m/c and you need to know what they are. OK? Once you know everything is fine then start TTCing again and you WILL have a baby (or babies) with proper monitoring. GO to the pg despite board for a good reference for a high FSH friendly RE.
I am sorry you have had to go through all the m/c; it sucks. I had 6 myself and now have 2 kiddos (I'm old; 40+)...