Can there be two bishops on white tiles? If not, can my queen be capture and then promoted so I can win the game? .
Can there be two bishops on White squares? If not, can my queen be captured and then be promoted so I can win the game?
I reallly. don't know what to do because I think you cannot that have two bishops on White squares when the bishop is the only captured piece.
Your only problem here is logistical. You can promote your pawn to any piece except the King, even if that means you have two bishops on the same colour squares, or two (or more) queens on the board; but according to the official rules, you must replace it physically with a piece of the correct shape and colour. What to do if no such piece is to hand?

In a tournament, the organisers will make sure to have spare pieces available for such contingencies; but in a home game, improvisation is the norm. For instance, if one of your Rooks has been captured, you can turn it upside down and call it a Queen. In this case, you can just say "that pawn is now a Queen", which ends the game immediately with checkmate.