HELP!??? DISTURBING WHAT DOES THIS MEAN??

I'm on the second day of my period and I went to wipe and this was on the wipe?!! I'm 18..I got my nexplanon implant inserted about 3 weeks ago, if that means anything...  its squishy but thick and doesn't lose its shape.. the small one was on the outside of my vagina when I wiped, and when I took my tampon out, the bigger one was on my tampon what is it what does it mean??? :(( this has never happened to me before