((((((Monique))))))) As if having MS isn't enough, some other "strange" thing has to come along.

I'm glad your pcp at least listened to you and took you seriously. Good grief -- it's your heart for crying out loud!! Last July 4th, I was in the hospital for a similar thing which turned out to be atrial fibrillation. My heart kept racing, couldn't take a deep breath, light-headed when I moved, etc. It corrected itself but now I have to take Warfarin, a blood thinner, for the rest of my life. Apparently if it happens too often, a stroke might occur. The "bloodsuckers" come to my house about every three weeks to check the Coumadin level. Mine is usually low.
Good luck with finding some answers and be sure to keep us posted. My heart goes out to you and all the other Moms with young children on this board. I don't know how you cope!!! Mine were grown by the time this dreadful disease really became active. Take care............