18 painful having sex

I'm 18 and I'm having pain during sex I started having sex on the 30th August this year since then I've slept with three guys all together and everytime its been painful and I bleed a little its a sharp pain like the first time I ever had sex , and the next day trying to pee is agonising what could this be don't want to go to my dr also the last time I had sex was the 18th&19th of October due my period on Monday I've been having a lot of pregnancy symptoms took a test last night and it came back a wasnt but I feel like I am really want to be aswell! I've been checked I don't have anything as I've never used anything