Moaning/humming in sleep??

So lately I’ve been encountering a new sleep disruption that’s driving me CRAZY. While I’m trying to fall asleep, during the stage right before actually being asleep, I moan or hum as I exhale? It alternates between short hums, and long drawn out hums. It’s definitely not snoring. I’m awake enough to hear and catch myself doing it, and it wakes me up right before I drift off.

Two weeks ago I had a weird cold/cough/sore throat that lasted two weeks, and these last 3-4 days I’ve been getting over it but still have a lot of mucus and sore/dry throat at night... I haven’t slept in nearly 3 weeks now 😩

I can’t tell if the humming/groaning is from me still trying to recuperate from my cold, or if maybe baby is pushing up against something that is making my breathing a little weird?? I’ll be 30 weeks in a few days.

Has anyone experienced this? It drives my boyfriend and I both crazy at night while we’re trying to sleep.