Yeast infection?

Hi so i’ve been on nexplanon for almost 4 month n just had my third breakthrough bleeding/ spotting for about three weeks and now my discharge is thick, white, and clumpy. could it be my nexplanon or a yeast infection? I am sexually active and even had sex today. I’m not sure what to do beings that i’ve never had a yeast infection. it has not much of a smell nor does it itch or burn in there UNLESS we use ribbed condoms but it’s always been like that. No indication of swelling either. I also wore panty liners everyday for the three weeks of spotting so that could play a role in this maybe? IDK help!