Adrenaline Problem?

I dont know if this is a problem or what, but if anyone has known, i was in and out of the hospital for the past two or so years. My dr said finally that I could start running about 2 months ago, then he said that I could start training about a month ago (weight training). Well..the weird thing is..I used to run about 4.25 miles a day, no prob.., but now??? Im running about 6.25 miles and im not even tired. Does not make sense to me. First thing i do is cardio. Ill be on the treadmill, cuz I can run on pavement, dirt, anything but a treadmill, as my joints really hurt if i do the next day. I can now run for 5 or so miles at about 6mph and ppl are just gaukin..Then i can go on an elliptical for another mile or so. I asked my Dr. about it and he said that im addicted to adrenaline. Is there such a thing. I mean this is kinda ridiculous. It appears that I have some kind of weird endurance or something. I cant stop. I wish i could..I dont know if this is good for me, but I can stop and if i do i feel not right, like my body needs it. Anyone ever hear of such a thing?

Never heard of it. Maybe your related to Forrest gump

Never heard of this but it sounds like your endorphins are flowin high and you just can keep on going. Not a bad thing at all I would think. Do you then sort of "crash" at some point?

I stay up really late..am at my peak around 2pm and lasts until late around 2am cant sleep then im tired like i havent sept much. This has been going on along time. Its not a funny or something I particularly like.

Not taking any stimulants of any kind?

have you ever had your cortisol levels checked

Just had all my values checked and everything is perfect. Maybe I need to see a metabolic/hormone endo.? Im takin Primo Baby and I do take supplement. I take a multi, flaxoil, red yeast rice, chromium picolinate 1000mcg, Ester-C 1000mg, and was taking Taurine cuz I was on clen/helios, but im off the clen/helios now. It was like this way b4 I started the Primo though. Primo mostly is for getting my muscles hard and more tone/cut. I have also been getting strength gains..Up a few plates on everything. Its mostly the massive amounts of cardio I do. I mean yeah, I like what its doing to my outer body, but I dont know about the inside..? Its like im super human..If i didnt stop at 6.25 miles, I know I could even go for another 2 miles. It is totally strange.

Oh, I forgot. I do take an NOS (AMPED) during workouts and of course a pre and post protein shake.