Yeast infection while pregnant?

EDIT BELOW

What are the symptoms you get when you have a yeast infection? I've never had one before. I'm 27 weeks and 3 days and I'm not sure if I have one. There's no smell or itchiness. Just slight burning but I'm not sure if it's from my toilet paper (I had to use a different brand). I know sometimes wearing underwear that doesn't fit can cause it, and I've gotten to the point that wearing underwear is hard since none fit. My husband and I also had sex (about 20 minutes ago) and when I went to the bathroom to pee after like I do everytime, I wiped and there was some slightly green discharge/cum. But it was more of a yellow tint. This is the first time I've seen it. Do I have to get it confirmed by my doctor? I don't have an appt til next tuesday and dont want to wait that long to get any medicine if I do have one. And with the holidays I cant get into the doctor any sooner. What can/should I use? And if I don't have one, will using anything be a problem?

EDIT:

I've used the bathroom twice now and have showered. My discharge is normal and the burning is gone. I'm thinking the burning is from the toilet paper because my body/skin is so sensitive. The discharge I'm not sure about. But I will still ask my doctor.