Pregnant or not?

Hi I am turning 32 years old and have two boys 7 and 2. My new husband and i are trying to conceive. My ovulation date was 1st of May. We have been having sex since the 26 of April right up until now. I have sensitive nipples and some nausea but a I am always hungry and have a lot of headaches all of a sudden. But my period is due on the 15 the May and i am having white discharge as in the picture attached. Has anyone experinced it and was pregnant? I really want to be pregnant we have been try for 4 months so far with no luck.