Wanting a second child but toddler still breastfeeding and not sleeping through the night

Are there any moms in here that has breastfeed through pregnancy? Or maybe have been in the same situation?

I’m not pregnant or anything but trying for a second child has been heavy on my mind. My son (14 months currently) is still nursing throughout the day and also to relies on nursing for nap and bedtime. I’m worried that if I’m pregnant or if baby #2 arrives we’re going to struggle putting our son to sleep lol.

Unfortunately, he still wakes up quite frequently. Maybe every 2-4 hours. I don’t have the heart to sleep train him and I was hoping that in the future he’ll just eventually sleep through the night.

Me and my husband do want to try for a second child but my son heavily relies on nursing to sleep and also is still waking up frequently. I guess I’m just feeling conflicted. I don’t want to wait too long and there’s just a large age gap.

Any parent that have been in a similar situation? How did you guys manage?