Honestly, I have no idea. Because you have had such compliations in the past I strongly suggest that you contact your doctor ASAP. Keep us posted!

This sounds a lot like me. I had that lump for about 30 minutes when I was 20 after getting out of a hot spring. I had a horrific migraine. Always had headaches, but now that i think about it they didn't become actual vomitting migraines until I was 20. Been having strangling attacks as well, getting progressively worse. I am disabled by my migraines and inject myself daily with immitrex. I have an average of 3 days / month without significant headache. Getting chest pains and strangling attacks that lead up to the migraines. I shake, then feel fine, just a little tight, then the headache comes and radiates from my neck and the back of my skull all over, usually settling predominantly on one side. Doctors have never tested my heart. They said I was to young to have problems. They just put me on psych meds...saying it was panic attacks. The meds never helped.

Started seeing a new neurologist and he found a large PFO....which is a shunt between the left and right atrium of the heart. Now I'm remembering all those strange cardiac symptoms and am wondering if they are not panic attacks.