I'm kinda freaking out about my supply. Help calm me down!

I had great supply right after LO was born. All the nurses talked about how they've never seen someone make so much colostrum. (I had to hand pump to give LO extra because his blood sugar was so low.) My milk came in right away and I was engorged for a few days.

Then the enforcement went away and my breasts feel super soft. They don't get hard between feedings like they did with my first. LO is a super sleepy preemie and doesn't have a very strong suck and doesn't stay awake very long to nurse. I don't leak anymore.

He does get plenty of wet and dirty diapers (11 of each yesterday, I think.) he is gaining about .5 oz a day. He's 8 days old.

The LC thinks he might have a rear tongue tie, although the pediatrician doesn't. We are taking him to an ent doc Thursday.

The LC wanted me to pump after each feed and supplement at the breast. He is hardly taking anything from the sns. I think I'm doing something wrong with it. I'm pumping mostly around .25 oz a time, but did get almost 2 last night.

DH says as long as he is gaining and has plenty of diapers, I don't have low supply. But I am so worried I've already ruined it by not pumping when my milk first came in. It seems like no one ever really recovers from low supply. I know they say if takes 6-8 weeks to regulate supply, but I'm worried it's already too late.

Should I be worried? Can I recover my supply? Is it even low? If he gets the tongue tie fixed, would my supply come back up?