Yeast infections are the pits! I'm glad you have some medicine to get rid of it. Try some vagisil wipes while it works. I have used the one day Monostat ovule with great success and gotten rid of yeast in a day. Was impressed (and happy). Anyway, you are sure you don't have a UTI? They can start and we don't have all the symptoms right away. It sounds like you've had a uti before and know how that feels. But since it involves the bladder and kidneys, burning inside could be linked to that. I never had burning inside when I was pregnant but it sounds like you did. This is familiar to you only when you were pregnant. Soooooo, maybe. You sound like knowing about your cycle at this time has gotten away from you. Wait a week and take another test. You CAN treat for a yeast infection while pregnant (did it myself) so there shouldn't be any reason you have to stop the medicine. Oh, and when at the doctor's yesterday, You didn't do a pee test for them? If you go back, definitely ask for one.
For remember your cycle, you can download one of the pregnancy apps, I have MyCycles. Or you can use a tracker here at medhelp that you find on your home page or you can keep a journal here at medhelp (also from your home page) where you just write the at you get your period and keep an ongoing journal to look back to. Then it's always in one place ( I tried doing it on paper and then like I have to keep up with that paper, lol, and that gets lost in my house or has kid doodling all over it!).
Anyway, let us know what a second pregnancy test says or if your symptoms get worse or change. hugs