DVT blood clot in a 20 year old?

I'm 20 years old, 6'1 236 pounds. Not in the worst shape possible but not in the best either. I play video games a lot and I sleep a lot. I don't work very much. Maybe 2 days a week. I earn money from gaming as well. So I spend a lot of time on my a*s... lol. I have had weird heart problems for 3 years now. I've been diagnosed with svt, anxiety, and hbp. I'm taking atenolol 25mg twice a day. Here recently I've been getting these pains in my chest and my left leg. It's in the middle of my calf right below the knee gets like this "hollow" pain. Best way I can describe it. I have been to the doctor so many times, and they just put me off as an anxiety case... but I know the difference... I have gotten a few opinions, but I make the mistake of telling them I have anxiety frst. I've had blood work and ekgs done but that is it. My BP has been extremely high before. Like 190 over 110 or so... but I have no idea. I DO NOT do drugs. I smoke ciggerates and take my atenolol. And even on atenolol, my BP stays either borderline hypertensive or stage 1 hypertension.