Chemical pregnancy following miscarriage?! πŸ˜’πŸ’”

I'm miscarried in March at 11 weeks and my heart still hurts for my Angel. This week I took a digital test on Tuesday morning and it was positive! On Thursday I took another 2 digital tests and both negative. Im thinking it's a chemical pregnancy or some horrible joke....But AF isn't scheduled to start until tomorrow. Waiting is so hard...