Congrats on using condoms. :) That's awesome.
It sounds like everything was done correctly, and lots of things about sex has a smell - her vagina, your semen, sweat, condoms - pretty much everything. That's normal.
Vaginas don't smell bad, though. Your genitals have an odor, as well. If anything smells funky, that usually means that an infection is involved, even something as simple as yeast or another fungal infection.
Most CSWs (commercial sex workers) take great steps in protecting themselves. They aren't so much worried about you, but about protecting themselves from you, and their other clients. Their livelihoods depend on it.
STDs like syphilis, HPV and herpes can be transmitted via direct skin to skin contact, and condoms to cover all the skin. Since her vagina didn't touch your skin, you should be fine. It's just something to keep in mind for the future.
Condoms significantly reduce the chances of you getting any STD, and eliminate the risk of gonorrhea, chlamydia, NGU, HIV and hep B, among others.
I hope this helps. Let us know if you have questions, and I hope you're getting help for your OCD.