well, for starters... you WAY overdid it. You worked out for a long time then came back later and did some more after how long of not doing anything? If your body is not accustomed to being that physical, then you run it through a marathon session of not one, but two workouts in one day... its gonna be sore.
I understand what it is to excited about doing something and overdoing it... I've been there and paid the price.
Hell, even now, being in possibly the best shape of my life, I get sore doing certain things. Right now I'm nursing a stiff neck from not falling right in my MMA class on Monday. My own damn fault, now I have to suck it up and deal while I recover.
What I'd recommend, or at least what I'd do... when you work out, make sure you warm up before and stretch out after. Gentle stretching... don't force yourself into touching your toes if you can't do it! Rather gently stretch, and when you meet resistance, inhale, see if you can slightly extend it farther on the exhale. Gets a little easier each time.
Tomorrow, miserable or not... you'll need to move a bit to help loosen your muscles back up. Warm up and gentle stretching. It will help in the being able to move around department... and help not be so miserable on Friday. Potassium also helps with the muscle soreness... like drinking a small V-8 after working out or I'll drink a glass of milk.
When you return to the gym, don't overdo it! You don't need to go twice a day, at least not yet. Let your body become re-accustomed to physical activity first.
And if you haven't already...
READ THE STICKIES in the exercise forum... there's helpful info to be had.
Good luck!