Happening regularly? Burping it out?

Since I (34F) was a teen I’ve periodically and always very suddenly developed severe pain around one lung or the other. It is excruciating whenever I try to breathe normally and it is absolutely debilitating, but usually only for about 20-30 minutes. The first time it happened I thought I was dying, but I recovered before I could physically get to the car to go to the hospital. Since then it happens probably up to 4 times per year, though there have been several years in which I didn’t have one. When it happens I take very shallow breaths move my body very gently which causes me to burp really loudly and intensely. I can tell it’s air trapped around my lungs, and can sometimes feel it moving around (painfully!) Burping helps me get it out. Eventually, after enough burping, it will just suddenly feel better and I go back to my normal life.

I’m only just now beginning to realize that not everyone experiences this. Tonight I looked up what this was to see if there’s some way I can prevent it and have been shocked to find that this has a name (I think I’m dealing with primary pneumothorax, hence coming here), can be potentially dangerous, and often requires medical treatment. I also see that it isn’t necessarily normal that I can burp the air out, and that it usually needs to be reabsorbed over 1-2 days if not medically treated. I’m surprised and a bit worried about how I’ve been handling this for the last 20 years or so. I’m also wondering why it keeps happening to me. I have no risk factors besides being a tall, thin woman. I suspect I did have endometriosis in my teens/early 20s due to extremely painful and heavy periods, but those symptoms went away in my mid-20s and I conceived 2 children extremely easily after that, so I assume my endometriosis (if I even had it - never properly diagnosed) has been in remission for the better part of a decade. I have never smoked/done drugs and am not asthmatic. Planning to go to the doctor about all this, but wondering about other people’s experiences.