Sleepy baby anxiety

I have a 6wo who by all accounts is gaining weight fine and everything but she's so sleepy and hard to feed a lot of the time and it really sets off my anxiety. We're triple feeding because she might have a tongue tie. She often doesn't get enough from the breast because she gets tired and falls asleep.

So feedings take forever with trying to keep her awake for breast and then bottle. Add in pumping and my entire life is basically structured around making sure she gets enough oz per day and I'm pumping enough to protect my supply.

Plus because feeding takes a lot of her awake time I'm worried she's not going to get other important developmental time. She'll be awake and alert during certain periods of the day and is holding her head up, tracking eye contact, making facial experiments, cooing and looking at things etc so I know this is just anxiety talking but...it's still a concern

She also only cries/is fussy sometimes but she won't always cry if she's hungry or cold. This morning it was chilly in our room and her limbs were cool to the touch, I was freaking out, but she was sleeping normally, in active sleep and out of it but no crying..but I know she was cold!!

So I try to explain this to people and they say, so your baby sleeps and doesn't cry that much , what's the problem? But it just doesn't feel like normal baby behavior and if I wasn't tracking oz and weighing her all the time, she probably wouldn't be gaining weight normally!! And it's just not sustainable to be freaking out all the time like this.

And no one can help, I have seen multiple lactation consultants, baby cranialsacral, a postpartum doula, my midwives...all just treat me like I'm crazy but not in a helpful way. I'm so depressed feeling like this constant terror of baby not being ok is just my new reality forever.