Idk what’s wrong?

My cycle is very regular I’ve never missed a period before and I’m 10 days late with negative test my discharge is very watery to the point where I need to change my underwear I’ve never had watery discharge before it’s always creamy in the beginning of my cycle then when I ovulate it goes to the normal clear and then back to white before I get my period The watery discharge makes me feel like I’m constantly leaking. when I missed my period I assumed it maybe be delayed because of stress but at the same time I’ve never missed a period so me missing it because of stress doesn’t even sound right.. I thought I was in a safe zone once the test came out negative but my cousin is telling me I should go get a blood test done. I’m a little worried about what’s going on and what I should do.

Also it feels like I’m going to get my period I have light cramping sometimes and Nausea is also normal for me when I get my period, I’ve been cranky and that’s normal for me too I’ve been getting these symptoms for the longest but every time I get hopeful there’s nothing