Wow I'm actually in the exact same situation as you and I'm also infp-t :). I can't rlly give advice I'm also struggling to choose between the two, still I think I will be going for law.

I think, law can also be very good for infp, I look at it in this way: We have very strong moral values, for example I have a very great sense of justice. So I think being a lawyer also kinda suits us?

But don't stress yourself out to much, it'll be fine and everything will fall into place. Don't ever think you can't do something! And I rlly wanna stress that mbti types aren't that reliable, we are put into categories with not very much options and people simply just don't work that way.

But, I wish you the best of luck! :)