vagina problems?? TMI

hey y’all, i’m posting anonymously because i’m embarrassed but anywho ever since i’ve started dating my boyfriend i’ve been getting these weird yeast build ups every morning that looks like toilet paper (i know it’s not) that smells like fish. it’s very annoying since i never had this unless i started dating him. i know he doesn’t have any stds since he has never had sex, received oral, etc before me. i really don’t understand why this is happening. we don’t use protection and he hardly ever finishes in me. i have no idea what to do to stop it. i clean my area with just water and wash clothes no summers <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> or any soap involved. i wear the right panties and let my area breathe. there’s nothing else that could be causing it except my boyfriends dick!! i’m at my wits end someone please help😭