Ford fusion

I'm 17 i cant even imagine what it must feel like to have been on planet earth for that long of a time

I'm a 17 yr old male and basically these past couple months I've been getting a ton of PAC's that can last for hours at a time, extra beats , fluttering around my heart and random pauses that last about 1.5 - 2 seconds in duration accompinied by a weird pressure feeling in my head....and all of this isn't consistant, it comes and goes but i get at least a couple of those symptoms throughout each day, see the thing is though, i basically turned into a major hypochondriac about this in the past month, being convinced somethings wrong, constantly feeling my heartbeat and staying up until 3am researching my conditions. I told my parents about this and they don't really seem to take me too serious and don't think i need to se a doctor since I've always had a healthy heart in my previous checkups. They thing its just my anxiety, I've been diagnosed with Generalized Anxiety Disorder when I was 9 .But I don't feel like I can get peace of mind until I know from a doctor that nothings wrong. What should I do?? I'm completely at a loss here. It's gotten to the point where I dont want to leave the house much because I fear my heart will stop

I turn 18 really soon and I feel like the best part of my life is over and now its just gonna be college work work work until i retire and die. 

Last night there was a windstorm and it kept me up until about 3:30 am and I had to wake up at 8:30 for school, it it dangerous to drive on a low amount of sleep?