Shopping Cart - Log-in Endless Loop

[TnA!]

Help, total ignoramus noob here.

Using v1.3.8 with the comstock stock with attributes mod added in (although I've disabled it).

Here's my issue, I went to bed last night thinking the website was finally running well.

Woke up this morning and proceeded to log into my admin. Nothing. It keeps redirecting me to the admin log-in page.

Went to my store site and picked an item and placed it in my shopping cart.
Clicked "Check-out" and got directed to the log-in page.
Entered my log-in information and got redirected back to the shopping cart.
Clicked "Check-out" and the loop begins. HALP!

p.s. I've also tried just going to the front page and logging in. My log-in no longer works and just prompts me to log-in. Any idea what file I changed to cause these issues?

p.p.s. If you need to visit the site to understand what I'm talking about: www.ncvape.com

[TnA!]

OK....looks like this thread can be closed or deleted. Of all the crazy things, just shutting down my computer and rebooting seems to have resolved the log-in issue with the admin site and my web-store's shopping cart seems to be working fine now.