I feel pain at exact where my heart is, no chest pain only heart pain, it doesn't hurt very bad but it is upsetting making me think im gonna have heart attack. it used to happen once a month and sometimes never but recently a month or so it started to happen very often usually at night when im going to sleep and it is not comfortable. What you think could be the problem? 

A year ago i had stomach ulcer(bleeding) but i am fine now.  This might also help you i am 6'3 tall and 205 pound my weight, i walk everyday about a mile and i do eat junk food not too but much usually at night.

Thanks