fatboy420:
So I've been eating as much as possible for about a month and a half. Some days I eat more then others but i make sure it's never less then 3500 calories a day, aiming for 4000 plus. I feel like my belly has gotten bigger but the numbers on the scale aren't moving much. Could I be losing muscle mass? What's the best advice to just blow up fast? Am I just being impatient?
You are probably just impatent. It takes time to get fat. Also, your body can only process so much at a time. The rest gets flushed down the toilet.
How much have you gained? You may be gaining a decent amount, but have warped expectations.
A couple of things to keep in mind:
Fat isn't dense. You need quite a bit of fat to equal a pound.
If your body has a near constant supply of food, your metabolism will burn away more of the calories. You'll get fat, but not as fat as a person who eats more sporadically.