My Bearded Dragons arms and Legs are Shaking.

Question
Hi, I've had my BD for almost 2 months now. He has always looked healthy and curious. When I bought him at the pet store I was told that he was around 4-5 months old. So right now he might be around 6-7 months old. He's a little over 10 inches long. I have a basking lamp and a Reptisun 10.0 UVB lamp. My BD's schedule starts off at 9am by turning on the lights. During that time he poops, most of the time he poops once a day, other days it's random that he poops 2-3 times a day. At 10am I feed him crickets. I give him 6-7 crickets that measure around 3/4 of an inch. I've given him veggies before but he's gradually starting to eat a little more veggies. At 3:15pm I feed him another 6-7 crickets if he has eaten the crickets from the morning. By 9pm I turn off the lights and turn on a 100w red infrared basking lamp so he can keep warm at night. The next day is the same schedule. I've never seen him act strange till today. I was gone for the weekend and left my mom in charge to take care of him. I would always call her to feed him crickets at his usual schedule as well to keep an eye on him for when he poops. My mom told me yesterday that she saw him shaking his hand. I thought she meant an "arm wave" but when I came home this morning I noticed that there were crickets in his tank and he was asleep away from the basking infrared lamp. I checked his temparature with a temp gun and he was 53F degrees. I changed the infrared lamp and put a 150w basking lamp and I imediately saw him widen his back, which I know is normal. So I followed the same schedule as usual, but a few hours later I noticed that he was shaking his arms and legs. He hasn't eaten for 2 days and is still shaking. He can walk, but sometimes when he tries to move he falls as if he couldn't pick himself up and stay like that. I carried him around and he never stopped shaking his arms and legs but he did start to seem more normal because he would move around and want to run around in my arms like he usually does when I carry him. He seemed more active when I had him in my arms. But as soon as I placed him back in his tank he continued shaking and looks really tired and cold. Before turning off the 150w basking lamp, he was at 91F degrees. He's shedding right now, but I honestly don't think that has anything to do with it. Another problem I'm just realizing is that everytime I would feed him crickets, I would always dust them with "Reptocal" with D3. I'm just learning that they're supposed to be dusted once a week. I would take him to a vet, but right now, like others, money is very tight. Can you please help me?

Answer
I would if I could, but I have no idea what's wrong...  Shaking is usually neurological but what was the cause???  Poison?  Parasites?  If it continues for more than another day or two and/or he doesn't start eating again, you really need to see a vet.  Sorry!