Anyone has similar experience?

Elena

It seems that I am 17dpo and 3 days late. I took a test this morning and it was negative. I have cramps and period like discharge (feels like it). My left breast had the sensation of milk production. I feel light headed sometimes. Am I testing too early or is it a real negative? I want this so much; am I making my body do all those things? Anyone else has been through this?