Tickle-like sensation in throat and other symptoms
I'm 18 years old, and I was diagnosed with Mitral Valve Regurgitation without prolapse back in July. I had an EKG and echocardiogram done. The cardiologist said that my regurgitation was mild and that it was okay to just follow up with him yearly.
Then in November I had an episode of tachycardia with difficulty breathing and palpitations. Luckily the attack happened right in the middle of the ER (I am a volunteer EMT) and I was seen quickly. They did another EKG and again, it was normal. I went back to my cardiologist a couple of weeks later and got a 24 hour Holter Monitor done. They said that came back normal as well.
Then last month I had a milder episode similar to the November one and ended up in the ER again. They took another EKG and said it was fine.
I've noticed lately that I've been getting these weird tickling sensations in my lower throat where it connects to the chest. It only lasts for about 1 to 5 seconds, and feels like something is tickling the inside of my throat with a feather, or like having phlegm that won't come up. The sensation makes me want to cough.
I've also noticed that I get tired more easily, as well as having the "skipped beats" sensation every now and then a few times a day. Upon physical exertion my mouth gets really dry and I feel dehydrated and dizzy.
I've talked to both my primary care physician and cardiologist about these symptoms and they are sure that my heart is fine besides the regurgitation and told me to avoid caffeine.
Any suggestions or ideas on what this might be? The tickling sensation has been coming every few minutes and is rather annoying.