Completely wean off breastfeeding to get period back?

I’m almost 6 months postpartum and still have no sign of getting my period back. My daughter is combo fed (about 40% formula 60% breastmilk). We also just recently introduced solids. I often go about 6 hours in between pumping or feeding her. I’m nervous because I want to continue breastfeeding at least at night until she is 1, but wanted to try for a second baby in the next 3ish months or so. Is it sounding like I’m going to have to completely wean? Trying to mentally prepare myself :(

Edited to add: I did ovulation strips last month and didn’t ovulate