Will my period ever return?

Ka

I’m breastfeeding my 15 month old maybe twice per night. She eats solid food really well and mostly just nurses for comfort. I have no sign of a period returning and I would like to TTC baby #4. I really don’t want to give up nursing her. Any ideas how I can get this damn period back? I have been taking ovulation tests daily since she was 12 months and no ovulation has happened.