I'd say you should ask for DHT and testosterone tests. If your on finasteride your DHT levels should of dropped, and it's possible that your Testosterone has raised slightly, but this might not be the case if you have been taken finasteride for a few months as your hormone's will re-ajusts.
While your at it a normal health check-up would be advised, like thyroid functioning i.e(white and red cell blood count), also cholestrol tests. They also normaly do tests for the liver been thats it's such an important organ. You can't for far wrong with a check-up like this.
Good luck Jack