Hey guys, im 27 and have had a receding hairline for years now. Its not that bad but yesterday I bought rogaine foam for the hell of it to try it out, put it on this morning but then had a change of heart with so many horror stories about shedding and never growing back in. My question is if I used rogaine foam once and never use it again will I shed hair at all? And will it affect my hairline at all using it just once? Thanks guys