Spotting confusion???

Brooke
Ive been on nexplanon for 7 months now and have had a couple periods that last 7-8 days. I only really check my cervix during my period to see how low it is. Today I checked my cervix and I noticed a TINY bit of blood on my fake nail. Idk if this always happens because this is the first time I've checked it when I'm not on my period. Any help?