Period is still MIA?

We have dropped our night time feeds for two months now and my period still hasn’t returned. My husband and I would like to go ahead and have baby number 3 close in age with our baby girl. I take ovulation test daily and there’s no change there yet. I’ve taken pregnancy tests and those are negative. I don’t want to go to the doctor yet and was wondering if there was natural ways to get my fertility back sooner without stopping breastfeeding.

Pic of my sweet babies. Hopefully they will have a baby brother soon....or sister.