Yeast Infection after sex?

[Lauren]

Ok, well I had sex last wednesday, and by friday I kinda felt an itching feeling down where your vulva is, and Saturday I was excercising on my treadmill and felt something I thought perhaps I started because I should start around the 9th this month but when I felt to see if their was blood instead their was alot of cottage cheese looking discharge. Kind of like soggy toilet paper thats been drenched in water and is disingrating? It didn't have any smell, so I started looking up on it. I'm pretty sure its a Yeast Infection. But me and my boyfriend, we use Trojan spermicidal condoms always. I was reading somewhere else that it could be the condom? but this is the first time that this has happened, and we've had sex well over 10 times before, then I got to thinking if I did anything different this time, and I remember after having sex wednesday I didn't bother to shower that night because I had just taken one a few hours before I saw him. I didn't bother to douche either, so I'm hoping that was the cause and I also read that once you start your cycle sometimes it'll go away on its own? If not what should I do? Please help, I'm kind of scared..