My vocals are too quiet compared to backing track
Hi, I'm new to recording music and recently I've been having some trouble with recording vocals for my covers. I mostly use Cakewalk Next as my DAW and connect it to my audio interface (Behringer U-Phoria UMC202HD) with the mic plugged in. I hear myself clearly on my headphones during the takes, and once I finish the recording and listen to it, there's barelyyyy any volume on the vocals. Turning up the volume of the recording in the DAW does nothing, same as turning up the gain on my mic. I don't know what to do.. Could you folks help?
Bonus question, if anyone knows an answer:
Some time ago I've recorded a cover, back when the volume problem wasn't a thing, but after saving the audio to MP3 I mostly hear the recording in my left earphone (the right barely plays any of the recording). What could be the cause?