Food allergies and heart palpitations?

[alexsophie]

To give some background - I have always had stomach problems.  As a child I was frequently constipated and had regular stomach upsets.  In college I would regularly feel very sick, and I had rashes near my elbows on my arms, and my eyes would constantly be swollen.  I have also always had weight problems, and I am struggling to maintain a healthy weight right now.  I am also constantly exhausted, but I have just learned to sleep 10 hours a night.  Finally senior year of college my friend suggested that I might have a dairy allergy when I felt ill after eating an ice cream.  Also some face washes make my skin break out, but I haven't quite figured out which ingredient does this.
Then a couple of years ago, and it would always happen after eating a large meal (usually out at a restaurant), I would wake up in the middle of the night with my heart POUNDING.  It would last at least an hour and breathing slowly would not calm it down.
I went to an allergist a few months ago and I tested slightly positive for milk allergy, she told me that I should just avoid milk, but it shouldn't hurt to have some.  I also tested positive for mold allergy but that is not surprising.  I thought I might also be allergic to almonds, since I seem to get a rash every time I eat them, but she said I wasn't allergic.
So I stopped eating dairy for good, and I thought my heart palpitations were over.  Last night I went to the movies and I had a "movie dinner", I shared some popcorn and peanut M&M's with my friend.  Half way through the movie I had another one of these attacks, where my heart starts beating like crazy out of the blue and I feel a bit sweaty and can't think straight.  It was horrible!  But I knew what it was and I knew it would pass in a bit over an hour so I just sat through it.
Any thoughts?  Does this sounds like it could be a chocolate or peanut allergy (since this was in the M&Ms)?  Or a corn allergy?  I cannot imagine that I have lived through 25 years of my life allergic to corn...I eat it all the time and it seems fine!
Should I go back to the allergist?  I feel silly since when I went she basically told me I'm not really allergic to anything (we didn't test chocolate or peanuts though (only tree nuts...I don't know if that's different)).  It is very scary to have these attacks, and I would just like to know what on earth it is!
Thanks!

[arz692]

I would see if it was a possible gluten allergy  cuz that's what i have and i had all those symptoms!

[Bella114]

Have yourself blood checked for igg response to dairy. That's what I have. It's not the typical ige that allergists test for but can cause nearly all the same symptoms.  My levels were off the charts for dairy. If I get any now, I'm sick with a lot of allergy type symptoms. Avoid it. You know your body!