I had sex about three weeks ago with this guy and we've had sex before then too. About two days we had sex the last time, I was felt like I had the urgency to go pee and I just thought maybe I have a urine infection. So I gave it time to see if it will go away and it did. But when I had my period about a week ago, I noticed I was having slight trouble putting a tampon in on the second day. My period was also a little shorter than usual. When my period was over and I was taking a shower, I noticed that my vaginal opening and all didn't feel normal. It felt like a bump was covering my vaginal opening. I told my mother and she told me to put a hot towel and see if it'll go away. In the meantime, we made an appointment for the doc but its in two weeks! But today I noticed it isn't really a bump. Its like the walls of my vagina are swollen and it looks whitish pinkish. I was worried that it was an std, but if it was, wouldn't I have the symptoms of an std in and around my mouth? Since I did have oral sex with him? And he did use a condom after all. But when we had sex for the first time, nothing was out of the normal afterwards. So what could it be?

It could be any number of things and even something as simple as too vigorous sex.It could even be an allergic reaction to the condom.

I would make it clear to your doc you need to be seen earlier and if that is not possible I would visit an ER.
It is always better to be safe than sorry.

While is very could be, it also could be some other things also, without a proper doctor visit you or anyone will not know for sure. I would do it ASAP.

Go to a clinic and get medical opinion. Don't leave something like this.