Does vaginal discharge during pregnancy taste like male cum?

Ok here's the thing. I had to leave town for a month for work and when I came back I had sex with my girlfriend, I loved giving her oral sex because its awesome, back then she was around 6 or 7 months pregnant. But while I was eating her up I got this taste like if she had sex the day before, like when we have sex and I cum inside her and the next day I happen to eat her p***y it tastes different from when she's clean and I've ate her plenty of times, I even got her to cum in my mouth so I know what her juices taste like but that day sure as hell she tasted like cum in her and I told her. obviously she swears up and down she didn't have sex with somebody else but I still would like to know if being pregnant and having vaginal discharges would cause to taste like that. Cause hell I was gone for a month dammit.. lol