Tight vagina.. Help

I had sex for the first time like a week and a half ago and it hurt so much that I did not really feel pressure from it. I think my vagina is just really tight and I didn't use lube nor had enough time for foreplay. I masturbate but for some reason I've always been scared to finger myself so I just rub it (still feels awesome though). Anyway, any tips on how I can "loosen" up my vagina? Or tips on how to finger myself?