sex and relationships

so i’m 16 right now and i had my boyfriend my sophomore year and through out the summer. i did lose my virginity i him but we broke up and are no longer together. i met someone else and we were pretty serious and we became sexually active. he and i too fell off and stopped talking to each other. i tried to reconnect with my ex recently because i really do love him and i always will and i has sex with him again but we realized it wouldn’t work out. a couple days later i had sex wither the guy i dated after my ex and i just feel bad about everything. does this make me a hoe in anyway?? this guy was someone i was serious with as well we just let each go for many reasons. also i don’t use condoms because i’m allergic and i’m also wanting to know if i couldn’t possibly get an STD