Blood during sex?

Kayley
Hi, me & my husband are TTC.
Anyway, we had sex last night and when he pulled out there was a bit of blood on his penis - not proper red period blood, but like a light salmon colour. I'm not due on my period for another 6 days, & I am very regular. 
Has this happened to anyone before?
I guess I'm just hoping it was something to do with early stages :(