burning during/after urination, frequent urination

Hi. Ive been having a burning feeling inside my vagina for the past week. It started right after my boyfriend and I had protected sex, and for a few days it lasted all day and night. Now it is on and off, but it burns when I urinate, it burns after I urinate, and I'm urinating between 10-20 times a day. I thought this was due to my period (which I got 4 days after I had sex) but it hasn't gone away. My discharge is normal, and actually less than it used to be. I tried to flush out the problem w/ cranberry juice and used Monistat for a day. It helped minimally. I just looked at my vagina and the hole is the size of a pea, maybe smaller. I have what looks like inflammed skin over where the hole has always been before. I can't take the burning anymore, does anyone know what I can do? I'm a college kid so my family doctor's not near me, but should I just try and get home soon and see her anyway? thanks