your best bet is to take a pregnancy test and see if you are pregnant or not.. It's scary but the sooner you take it the better it will be. You can take free ones at a planned parenthood in your area. Then either way the test turns out you need to see your gynecologist and they can run a biopsy on the discharge and tell you what it is as well as a pap smear. It's scary but hang in there you will get through what ever this is. the first step is finding out what you have to deal with then after that it's going to be ok.
Your discharge sounds normal and healthy in colour, I do get discharge like that myself with it seeming gooey and stringy, this seems more apparent when I am near ovulation, and mentioned this to my doctor at my smear test, she told me that it was fine and everything was ok with my results.
Unless it changes in colour or becomes clumpy looking I wouldn't worry.
Hope this helps
It usually happens around ovulation. So make sure you use protection around this time, because this iis your most fertile time of the month.