I'm so confused deflated and gutted

Leigh
So yesterday I was on top of the world me and hub lost our baby last June at 10 wks and have been trying ever since I have 2 children a boy and a girl so know I can carry. I had a Vfl on day 28 of cycle (sat) which is early for me I usually have a cycle of around 31-32 days but can be up to 35. Got another positive test on Sunday afternoon again quite faint but definitely there. Today first morning pee completely negative??? I'm so confused 😢😢😢 
Top test Saturday (day 28) next one down was Sunday pm (day 29)
Next was first thing this morning (day 31) and 4th one was again this morning any ideas help or advice totally appreciated!