i need advice !

so my mom knows i’m in a relationship right? and recently since i just got into it, me and my boyfriend have been sexually active but the thing is that i wanna know if i have any std’s, etc (i hope not tho) but idk how to go get checked bc i am scared of telling my mom that i am being sexually active with my boyfriend and she knows we have had sex only once ( we were each other’s first) she just doesn’t know that i have been more sexually active and idk what to do bc i wanna know if i’m clean & i kno my boyfriend isn’t dirty or something bc he hasn’t had sex with another female, only me. i don’t know what to do! someone please give me advice bc i am soooo worried if i have a type of infection or something .. and we never use a condom.. plus i’m only 17 😩