I think, right now, it's bitting more than I can chew.

I get my hands on way too many projects because they're easy and then problems pile and I end up being behind schedule on everything.

That, and maybe sometimes subconsciously thinking I'm invincible. It's a direct psych response to those telling me I can't do shit, and then I do shit out of pure stubbornness, and then I have super-confidence for a short while. (Even if I don't show it)
I just don't think it's healthy.