Eliza: Thanks for all the extra info!

I know everyone's saying my fisher's a girl, but I still think its a boy, but I'll ask the vet what she/he thinks when I go. I'm hoping it's a boy cuz I really don't wanna deal with the egg laying because it was so stressful on my female veiled I had before. And it stressed me out because she was stressed out...
And I see how your male was small too. I have small hands and when I first got him he was so little, but he ate all kinds but still grew so slowly. I tried to measure him, but it's kinda hard ya kno haha...but what I could estimate he's about 6 inchs from nose to tip of tail, but yours looks much stockier than my little guy. That's why I tried to make sure he ate enough (i.e. waxworms) since I always feel like he's a bit on the skinny side. But like some have said, some species grow slower than others, since my female veiled grew pretty fast. In the end, I don't really care how big he (or she) gets as long as he's healthy and happy.
**I have an appt. at 10:30AM tomorrow at the Avian and Exotic Clinic in Monterey.
Cainschams: Thanks for your input. I was making sure he got enough food because I thought he wasn't getting enough since he was still so small, but it's not like I force feed him. He has a little ceramic dish I put the meal worms in and (I've run out of waxworms last week actually) and he eats them when he wants. And I thought I had put it, but he does eat silkworms. I've ordered them online and all that. Same thing with the crickets, they're live so I toss a few in there and let him go at it. For the spiders, its only sometimes if there is a daddylonglegs roaming around my apt. I've even seen him grab a couple of little common green caterpillars that eat my plants outside during the spring/summer last year too.
As for the calcium, others have mentioned it also, so I won't give him the calcium as much, only 1-2 every month.
Temperature wise, like I said it only gets up to 84
during the summer, but
I live there too, and I don't like to die of heat, so I do turn on my AC. As for keeping it 60 degrees or less, like I said, I live there too, and that's way too cold for myself. I don't have a special room just for him, its a 1x1 apt, I'm a college student, I can't afford a house or even a 2 bedroom apt. And I've housed a female veiled and him at the same time for over 2 years and it's worked.
Humidity, I'm going to try a couple of things everyone has suggested to help with that. I wish I had a nice green-house like structure for him, but I don't have the room for one.... :\
Thanks for the luck everyone, I'm hoping its something the vet can easily take care of too.