Breastfeeding help for 3 month old

Hi! Need some advice please. I’ve never been able to breastfeed past 3 months (long story).

I feel like this time, I’m actually doing it?

I know the let downs aren’t as strong/may not even feel them at this point. I know to count wet diapers.

But.

Here’s the thing. I honestly just can’t tell. His diapers are wet, but not like “heavy” wet. Changing him every 3 hours-ish. He hasn’t spit up since he was 3-4 weeks old. And just in the last couple of days when he’s been cluster feeding, he’ll burp and then spit up milk. He still nurses every 1.5-3 hours. He does wake up 2-3 times over night still.

I’ve just never been able to go this long breastfeeding. Any suggestions, advice, anything would be helpful!