I occasionally get Supraventricular tachycardia and took a red bull last night about 2h before bed as I have a big job interview coming up tomorrow and have lots of preparation to do. I was also found to have hypertension about a year ago, mostly work stress induced but I decided to go down the exercise route rather than medication.  Last night before bed and after the red bull I felt like I was having an SVT episode where I felty breathin seemed strange but didn't feel any tachycardia. Still feel a bit strange this morning but pulse seems strong and regular. Do you think I need to get this checked out as a matter of urgency?

Summarized question: What causes Supraventricular tachycardia?