Help! :(

I was wondering if I could have some advice please as I feel so low about the situation. 3 years ago I had an abortion, since then I have put on a lot of weight and am struggling to conceive. I have irregular periods and have been constantly taking ovulation strips but they are always negative. I’m doing my best to lose the weight but it’s not helping😞

I feel so down,has anyone for any tips please?

And are ovulation strips always accurate/is it possible to ovulate despite having negative ovulation tests?

Thank you xx