I've had sex a without a condom and my boyfriend pulled out. A few days after he fingered me in a public bathroom. Ever since I have been receiving sharp pains on my vagina and my vagina is very sensitive. When I while after going to the loo small amounts of blood are present too, and when I urine my vagina hurts a lot. What does this all mean?

He could have scratched your delicate tissues with his nails, or been generally rough, and you are sore from small cuts. But more likely you got a urinary tract infection (UTI), very common. You need to go to a clinic so they can test and give you an antibiotic. That's just a guess, of course.
Pulling out has a high pregnancy rate because semen can leak out. While at the clinic, get birth control.
Refrain from sex while you take care of this.