I’m at a loss of what to do - breast feeding

My baby is 15 days old today, and I’m struggling with breast feeding. I’ve had the lactation specialist come to my house and tell me that I’m doing everything right. She explained that it can take up to 6 weeks to “become a master of breast feeding”

My issue is that I have flat and inverted nipples, that don’t respond well to stimulation. My baby does well on the bottle, and so I have been pumping for two weeks. My milk is in, and I’m keeping up with what she needs… I’m just exhausted and I feel defeated as she won’t latch on to me.

She has gotten used to the bottle nipple, so I got the Hakka bottle nipple shield which she does latch onto, but feeds for over an hour (split between both breast) and is still hungry afterward and we end up giving her a bottle.

My baby sleeps anywhere from 4-6 hours at a time, but I’m awake every 2-3 hours pumping. I’m getting no rest when she is sleeping very well for being so small.

I am prepped with a ton of formula in my pantry but I feel guilty in stopping the breast feeding, but I genuinely don’t know if I can continue as I’m exhausted from pumping and just giving her bottles.

I don’t want to have to pump for the next year, and have to carry all of the pump accessories around with me anytime I go out for more than a few hours….

Mommas, help me. What do I do?