EBF & sudden supply drop 😢

I EBF my baby who’ll be 7 months on the 29th. The last two or so weeks he’s acted extra fussy while nursing, wanting to eat more frequently and waking more at night again wanting to eat. He gets solids throughout the day too. But I chalked it up to a growth spurt. Anyways my mom had him this afternoon for a few hours so I pumped the missed feeding and I only pumped 2.5 oz, and usually get 4-5 😢 I don’t know what to do. My goal was 12 months BF but I’m worried he’s not getting enough. And I got my period back at 4 months postpartum and it didn’t have an effect on my supply so I don’t think it’s that. But any advice aside from adding in pumping sessions? Is a supply drop normal?