HELP...CONFUSED

Megan
No TMI PICTURES!
So I went to the bathroom a while ago and instead of it wiping clear or slightly white.  It wiped as a BROWNISH!!!  I'm 17+1 today....I don't remember this with the other 2 kids (almost 10 & 6 1/2years).  I don't want to worry my husband if I shouldn't be worried but I kind of am.  What could it be???
This may tmi but may be relevant info, I have been extremely horny and we have been having a lot of sex. He is well endowed and sometimes it hits.(wondering if that's why it's a little brownish) but it's been clear all day.