There is no risk at all from fingering.
Rinsing your penis, or even washing with soap, after doesn't do a thing to prevent infection.
How brief was the oral? Oral sex is a lot lower risk than intercourse, and I can give you a better idea of your risk if I know how long you mean by "brief" - are we talking a few seconds? A few minutes? 15 minutes? Regardless, most experts don't think one encounter of unprotected oral warrants testing.
If you have a date this weekend, and plan on having any kind of sexual contact, use condoms anyway.
Also, just a note - I notice that you mention that your partner has "multiple partners", as if this makes her at some kind of risk you don't have. You are going on a date this weekend, and don't want to transmit anything, presumably because you'll be having sex. If you had sex a week ago with girl #1, and are going to have sex this weekend with girl #2, that means you also have multiple partners.
I should also add that the tenderness was instant and I feel has gradually become better per day