chemical? Pleàse Help!!!!

I am just at a loss of words. what happened?!? is this a chemical pregnancy I have never had this happen in my other 2 pregnancies ... we have been trying since February with nothing I was just told i have PCOS and now see a fertility/Endo doctor. I'm suppose to call on Wednesday to tell them if instated or not so they can start me on a pill to force a period so I can have some special sono.... this is all so new to me but please is this a chemical or was I just crazy and the test wasn't positive first test was Friday second test was Saturday third test Sunday and forth

test today all on time frame all with FMU.