Chances are really good that you didn't get anything, but there is a slim chance that you could have gotten gonorrhea, chlamydia or syphilis. The chances are really very low, but if you want to, you can test for gonorrhea and chlamydia now, and syphilis (which is uncommon in most developed countries) at 6 weeks.
This is all really for peace of mind, and I expect all of it to be negative. I only suggest it because you're still worried, and this will help you put it to rest.