What Is It?

Hi,
last night after I had my female friend over for sex, when I went to put the condom into the bin that there was what looed like little peces of sin or you know when milk goes chunky? Little bits of that on the outside of the condom... This was aout 30 to 45 mins after it was used.... It sorta looks as though skin has stuck to the condom during intercourse or something like that. I was wondering if there is sn sti or something that would cause soething like this?
Worried...
Thanks

i didnt see her vaginal area so I cannot comment on that sorry...