Does Vaginal Discharge And Weight Gain Indicate Pregnancy?

I have white, milky, and thin vaginal discharge. I keep track of where I am on my cycle as well. I am about 12 days past ovulation. I thought that discharge like this was normal, but I thought it was really only normal to have this type of discharge right before ovulation. This discharge has been the same all month besides the 5 days I was on my period; which was Jan. 29th- feb. 2nd. I have been sexually active though as well, is there any possibility I may be pregnant? We only used the withdrawl method. I have been experiencing some weight gain(mostly blosting), and some light cramps.