Does this sound like a yeast infection?

For the past two days I have been having a lot of very thick white discharge. My vagina also feels and looks just a little swollen and red near the opening and it’s very uncomfortable down there. I have never had any type of infection so I’m not sure what it could be. It started a day after being sexually active so I’m pretty sure it has to be an infection. I don’t have health insurance so is there anything I can do before going to the doctor?

I also just got off my period when the symptoms began.