i always get negative results. did anybody experience this?

i've been using urine ovulation test kit since Feb'17. however i always had negative results. there're only 2 months i tested with positive results. i got ruptured ectopic pregnancy last dec'16. removed my right tube. and now i'm TTC. i puzzled and don't know why.. did anybody same as me? am i not ovulating? any recommended ovulation test kit to use and what to do in order to get positive result?