For the past 2 nights, I've noticed I have difficulty falling asleep bc once I lay down it gets hard to breathe, idk if it's just in my head or what.. I've noticed it's hard to breathe through my nose even though it's not clogged, it's hard to breathe out of my mouth too sometimes

I did my pulse and it was 70 beats in 1 minute

I'm only 19, so idk if I could have heart failure.. I'm very, very out of shape, but I am petite. I'm 5'4 weighing 125

The only heart problems in my family is heart palpitations, idk if I have that bc sometimes I feel my heart skip a beat and it scares me.

I was diagnosed with severe anxiety in 2012, and it has been on n off lately so idk if it could be that too. Sometimes my chest feels tight, never any pain.

My grandma has sleep apnea, and I've been told by my mom, brother and boyfriend that they noticed I do stop breathing in my sleep here and there but rarely.

I am so scared. What do I do? I'm gonna make an appointment but I would like to hear your opinions