Positive tests (like 10 over 4 days) and now negative? :(

Chemical?

10 dpo - clear blue digital positive. First response digital and non digital positive. Cheapy dipstick positive.

11 dpo - cheap dipstick positive.

12 dpo - first response digital positive. First response regular positive. Cheap dipstick positive.

13 dpo - (period due) first response positive. Cheap dipstick positive.

14 dpo - first response digital negative.

I am so disappointed in the negative this morning and I keep telling myself maybe it's because I peed at 4 am then used 7 am urine to test and I did drink a lot of fluids last night but how realistic is it that this is just a chemical and I should learn to not test so early? I was supposed to get my period yesterday and haven't yet but it's only 11 am. I cried all morning. This sucks! Def not testing early again.