Conceiving

Nina • married 2016 and we are trying to conceive.
I am struggling to conceive :( I was on the depo injection and it finished 9 months ago I had a bleed in Feb, and March at the same time in each month, last month I came
On around the 20th so I am waiting to see if I do this month. But I have done so many tests for ovulation and they keep saying no LH surge, I am getting worried and wondered what I need to do and if I was pregnant when would this show! Thank you