For the past 2 months I've been experiencing palpitations with some occasional chest pain. The chest pain i thought was due to working out as it usually subsided within a day. The palpitations were an occasional skipped beat, mostly noted during running. I thought just needed some rest and dialed the activity back. Well yesterday i was feeling good and went for a light jog. Nothing note worthy other than one palpitation towards the very end. Well today upon getting up i was at my desk standing when suddenly experienced a racing heart. I immediately started freaking out at i was having difficulty breathing lightheadedness and chest pain. The tachycardia happened 3 times within about 10min lasting maybe 30sec each. I decided to go to the ER where eventually all my symptoms went away. They ran xrays ekg and blood work all of which was normal. I'm seeing a cardiologist in 3 days but I'm freaked out right now. I feel like i could have another episode at any moment. I still have some center chest pain, especially when breathing deeply. Worried about things like embolisms as i have a desk job where i sit often. Has anyone experienced anything like this where it turned out to be benign?