Could rogaine make my hair worse?

[The Prestige]

Finally gonna make the plunge into using rogaine (cant take DHT blockers as my T is already low). Is it possible my hair will end up worse off? I'm not talking about the shed, but overall after the shed, can rogaine make me worse off? Also what concerns me is I read "I had a shed, but then my hair came back thicker". How do you know that you're not just back at baseline and just the shed hair came back?