Any one relate? Happen to them?

My LMP was March 26th. Last Friday I took a test, negative. Weekend came and went, no period. Took a pregnancy test Monday morning, positive. Another test Tuesday morning, postive. Last night after work I went to take a urine sample at the hospital, today they call and say it's negative. I wasn't planning on taking a test last night so it was at 5pm, after a work day of lots of water. Is it possible to be a false negative or did I really get two false positives AND still no period. I have slight cramping, nausea here and there too. My boobs are SLIGHTLY sore. I was expecting my period 2-3 weeks ago.

Here's my positive test results