This is totally normal actually. I don't think it has anything to do with the baby. It has to do with your sinuses and how you how you lay.

I can breath fine from my mouth fine its just when on my left side my nose gets blocked off ,@brandylemonds15

It could be how baby is positioned something is like putting pressure on your lungs making it difficult to breath , in my case I think it's just cus I've had a cold for the past month

oh no that's must be difficult I think I need to call the doctor to see if its normal cuz laying on one side is hard especially when that side falls a sleep so u gotta turn to the other but I'm not trying to suffocate @brandylemonds15

I don't know if it's normal or not but the same thing happens to me but if I lay on my right side my legs fall asleep and my belly starts cramping so I have to lay on my left side