About two days after the last time I had sex I started to have an excessive amount of thin white and/or clear discharge. Each day there is more and more discharge. And today I started feeling a little pain in my lower left abdomen. That's been about thirteen days since.
Discharge is normal - it helps flush the vagina, keep it moist and lubricates for sex when aroused, etc. However, if the type/color/thickness/smell has changed you should get it checked out. It could be nothing or it could be symptomatic of a yeast infection, STD, etc. Have it confirmed by a doctor and then you'll know how to recognize it going forward. Hope you feel better soon!