Java exploit?!?!?!

Ok so earlier this month I was searching for some stuff and I was re-directed to a site that was rather unsavory, but I digress, it said something about "please wait while we check your browser" and a red blah went up in my mind so I exited out of Firefox. Ever since hat my computer has been kinda buggy so today I ran avast and it picked up several java exploits, one of them was cve 2013 and I think it mentioned something about remote accesses and I'm kinda scared idk if people have been Stealing my data or like I've heard of the NSA using exploits to track people and....I digress, I'm just really worried (understandably) and I'm also curious if this all stems from a problem I had way back and if something keeps lurking on my computer. Though, avast didn't give me an alert when I went to the site.....so now I'm scared..yeah. So any help would be appreciated.





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