M/C back in March no positive LH surge for 2 months

I start on day 9/10 and pee twice once in the morning and once back from work so I make sure I don't miss a window. All have been clearly negative barely ever changing to any dark lines. I was pregnant with twins and lost them in March had a D&C my levels took a few weeks to go down to 0 but then I had my first period finally and then started trying to test until I have a period. Has anyone had this happen before? I mean I know it's only been almost 3 months since the loss and we aren't rushing it was more trying to track how my body is after the loss.we would like to try again. opk worked the last time??