Idk whar to think!!

T-Lady • My fiance and I been together (exactly today 󾠶/󾠯󾠱) 7yrs and engaged since X-mas. Trying to complete our family with a #BabyGirl..
What is going on with me..AF is die on the 17th and normal is 5 days for me. For the past 2 months and bleed about a week b4 AF was due and only for 2-3 days. Still getting neg HPT and blood test. What is wrong?? Losing hope