Glad I only did a half-hearted minor in physics when getting a BS in math. Today I would never attempt that.particle physics holds the keys to the universe, from Cooper pairs to Josephson Junctions to quantum coherence to flux qbits to machines that were only theories a few years ago.
In any event your academic record doesn't count until you get to grad school. Then you are playing for keeps and I couldn't move to engineering quickly enough. Stieltjes integrals? I don't think so!