Trichomoniasis??? Yeast infection?? HELP

So, i had sex on 30th august, and me and my boyfriend always have protected sex, and this time we did maybe 10 seconds of unprotected. After sex i had my normal discharge i always get after sex, but there was a tiny bit of blood mixed with it. Later i could see blood only when i wiped myself but it stopped after a few hours. So, now, my vagina started itching so bad and burning when i go to the bathroom!! I have been using canesten cream for 2 days now and the burning stopped, but it still itches a little bit. I was thinking trichomoniasis because i bled after sex, but my boyfriend never had sex with anyone else so there's no possible way he's infected, right?