i have been on finpecia (gen prop) for a little over twelve months had all the usual issues eg: sheding, hair got worse before better. Im not sure I have regained any hair but its certainly slowed down the loss. So far I havent developed 38dd's, everything is good downstairs I have even managed to have a baby in the process (with my wife of course). Some people complain of light headedness and confusion but Ive always been like that so wouldnt know the difference. My advice is to give it a go and see how you react, I cnat see as you have much else to lose (apart from hair) plus to pull of a good topper you need to maintain your side hair to (unless you fo full cap)

Good luck and all the above is just my opinion and I ant no doctor!