suspected allergic reaction

Hello doctors of reddit!

34f 5'4" overweight (probably 210-230). I currently take famotidine daily and no other meds. Non-smoker. For decades now I've been having what I think are allergic reactions. I'm wondering now if that's actually the case or if it's really something more (or less) concerning.

It feels like being stabbed in the center of my chest repeatedly. It is generally worse when I'm actually eating something, but sometimes it feels awful even when I'm doing nothing, or simply swallowing. It comes in waves, the pain gets super intense and then fades out to nothing. I might have several waves back to back, or one every 5 minutes, or every 30 minutes, depending on the severity of it. Sometimes it lasts for hours and hours. Sometimes 1 benadryl will stop it, sometimes I have taken 2, waited 4-6 hours and needed 2 more.

Last night it started, I took benadryl, and it petered out. When I woke up this morning I had another 3-4 stabby feelings, and then it stopped entirely. Often I can point to a food I think it's related to (I suspect latex allergy with related allergy to avocado, melons, shellfish), but a couple of times it has happened a few hours after yardwork, which could maybe be a latex exuding plant?

I've never had trouble breathing, so this can't be anaphylaxis right? Could it be hives in my esophagus? Is it possible it's actually acid reflux? I had severe acid reflux that hospitalized me a number of times as a kid, but thought these were two separate things (more details on this below if needed). I still have a more normal acid reflux on occasion and it doesn't really feel like that.

Sorry for the long winded post! I'm hoping someone can shed some light on this for me so I can figure out how concerned I should actually be.

Thanks in advance!

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In case it's needed, some more details on the acid reflux. Probably started when I was about 10. I ended up in the hospital and they assumed food poisoning. Vomiting and diarrhea, loss of consciousness, hot and cold. The second time it happened they thought maybe it was a food allergy. Between the ages of 10-20 I was taken to the hospital for it 3-4 times, but only admitted the first time. I also had less severe attacks - too many to count. Sometimes a week apart, sometimes a year apart. Usually involved hives, my entire body turning red, sometimes diarrhea and/or vomiting and sometimes fainting, sometimes did include traditional acid reflux. After years of trying to determine what I was allergic to, a doctor thought it could be very severe acid reflux. In my early 20s I started taking an acid reducer every day and haven't had any issues since. It's been so long that I can't really remember if I had the same stabby feeling in my chest or if it felt more like acid relfux. Not sure if this is related, but also not sure it's not related.