I'd even go so far as to say ease off those topicals. At your very early stage of thinning, finasteride should be extremely effective. Problem is, you will attribute gains you make to your entire regimen when it's really the finasteride doing its thing.
I know where your head is at right now- You want to do everything possible to hold on to your hair and you think it's worth it to throw everything on your head, even if it's redundant. That's normal.
Before I started finasteride, I did minoxidil for a little over a year. It did nothing but cause frustration, irritation and make my hair look and feel like $#iT. All topicals are sketchy as hell at this point. So you don't want to end up making all these gains due to finasteride and keep spending time and money on topicals when they're probably doing not very much or nothing at all.
To drive the point home, my Derm doesn't even prescribe minoxidil anymore (5% is not OTC in Canada). He says minoxidil creates too many frustrated patients. He literally laughs when I ask about other topicals. Also, if you'll notice, there are very few posters on this board who've been on finasteride for more than two years. I'm assuming that's because they've conquered their problems and don't need to come here. I know I stopped frequenting male pattern baldness sites after I started recovering.
I'm back now because in my seventh year on finasteride, male pattern baldness has suddenly resumed. Sucks, but I did gain around five extra years with perfect hair.
So yeah, I'd really consider dropping those topicals and sticking with the finasteride. It worked GREAT for me.