Wanting to get pregnant, possibly perimenopausal??

I need advice. I just turned 35.

We are trying to get pregnant for our 3rd baby. Both of my first 2, was a very easy process. Within 2 months of trying, we convinced, 2 healthy babies. (I know I have been very blessed). But we know our family is not done.

After almost year of breastfeeding, my period did not come back. I saw my doctor about 4 months after I stopped breastfeeding, and he tested by FSH and estradiol and my results showed I was perimenopausal. He put my on a progesterone dose pack to try to get my system jump started. And it worked, my period came back. It is irregular, fluctuating from 20-35 days each cycle. But after a month, my FSH and estradiol were much closer to normal range.

This was almost a year ago, and we started trying for #3. I have tried LH test strips, but the LH levels fluctuating a lot through my cycle.

Due to my hormones still being a bit out of wack, is there a different ovulation tracker that you suggest rather than the LH strips?

Any suggestions on next steps I should take?

Thank you!