Need advice - Visited an attack site by accident!

So my cousin wanted to show me something and took me to a site that sometimes has malware on it. I wan’t on there long, but after some research it does sometimes cause malware/virus. I ran a boot time scan and even a free trial of malwarebytes full scan, and nothing was found. Do you think I am safe or should I reformatt to be sure?

If you want a check, attach OTL diagnostic log that you find in the guide at top in viruses and worms forum section

No clue how to do any of that

It is all explained in the guide

See http://forum.avast.com/index.php?topic=53253.msg451454#msg451454