I got my mic to work, but now my MIDI controller doesn't make a sound

[snakeman5001]

Hello. I seem to be having an issue with my MIDI controller in Pro Tools 2019. It started because I was fiddling with getting my microphone to register in Pro Tools, but now I can't get a sound out of my MIDI controller. I can see that it detects my keyboard, but there's no sound coming into my headphones. I've tried messing around with the with the inputs and outputs but nothing. I can hear stuff I recorded previously just fine, but trying to play something? Nothing. If anyone can help me, that would be terrific. If you want to know what MIDI controller I'm using, it's an M-Audio Axiom 61 keyboard and my interface is a Behringer UMC404HD.