I also agree - RELAX!! Rabies is transmitted through the saliva of the animal, so contracting it through a scratch is not very likely - and even if you had been bitten, you would have shown signs/symptoms of rabies if you had contracted rabies long before now. First symptoms of rabies usually occur within a couple of days to a week after exposure.
It's perfectly normal for your sex drive to go up and down - sometimes being a lot higher than other times.
As far as the feeling of a thick coating of mucous in your throat - that could be related to your anxiety, dehydration, or even your GERD.
Sit back and relax and as stated by the poster above, unless the scratch is showing signs of infection (fever, swelling, redness) - don't worry about it.
I agree there is no reason to think you have rabies. you weren't bitten by the cat and it has no symptoms. And, I agree with gymdandee that the masterbation is just usual and your drive varies as it does for all of us. If the wound isn't infected I wouldn't worry about it. Relax.
It's your anxiety! Nothing about this has to do with masturbation!!
Masturbation is normal and everyone masturbates! Married couples masturbates. Try to relax and know you're OK