chest tightness for a week?

before anyone says “go to a doctor” I know, I’m just looking for some possible input or maybe someone whose experienced the same thing.

I’m 31 years old, relatively healthy. I workout 4 days a week. I’m a social drinker. I on/off smoked cigarettes from 2011-2022. I then started vaping in 2024 and have just quit a week ago. I noticed some upper (in between shoulder) back pain 2 weeks ago, I thought maybe it was from my bed / pillows or from working out. It hasn’t gone away though. And then last Sunday I woke up and felt like my chest was really tight. Like not painful, but just a feeling like someone was sitting on me. That’s why I stopped vaping. It freaked me out. And now it’s still there. It’s definitely worse when I lay down. No other symptoms though. Just back pain & chest tightness.

I don’t have health insurance so I don’t want to just jump and go to the doctor only to find out nothing is wrong because it would be a waste of money. But I’m also freaking out a little.