http://www.dslreports.com/forum/comcast
Jessie, try posting your internet problem in that forum. They seem to have some pretty smart people there.
ok I've been digging and I think it might be your cable modem. If the comcast tech thinks it's the modem too call or email me before you get a new one, as I can get you a hookup on that.
Thanks, Josh.
Right now, I'm just leasing their modem for $3/month.