I cant log in.

My bf got banned for 7 days for hacking and he has my roblox account on the same device he got banned on. Today he got unbanned and none of his experiences would load so he went into my account to try and play something i guess? and all of a sudden my account was being weird and half the stuff wasnt loading. Hes not being serious with me at all and wont tell me if he did anything. So i logged out and when I tried to log back in it now wont let me log in or change my pass wtf is going on.