I am a 29 year old female. I am a fit 140 pounds. (i run every morning, though it has become difficult-- my heart rates are climbing through the roof -188bpm this morn--not normal for me) I have had palpatations now for 13 years off and on. Dr.s say this is not uncommon. However, lately I have been experiencing a consistant "heavy heart beat", like its working hard, not fast, just hard. This is combinded with the feeling like I'm going to pass out. I have had what I can only describe as hormonal issues too-- left breast has painful lumps that go up into my arm pit. I have had an ultrasound on my breast and 1 on my ovaries last year. Everything looked normal, though the lump is still there. I am worried now about this feeling like my chest is going to explode & I'm going to pass out. I wonder if this could just be stress related?? Or should i find another doctor? I live in a VERY rural area. Any advice is overly welcomed at this point.