Is something wrong?

So I'm a first time mom and my daughter is five days old and breastfeeding has been extremely overwhelming and stressful.

The first night in the hospital seemed to go well, she latched and fed multiple times and had good diapers.

The second night we got to experience cluster feeding and she spent 6 hours going back and forth on my boobs, crying at the top of her lungs in between feedings and never sleeping. Nurse said it was normal.

We were discharged the next day and she slept a lot that day, I assumed she was catching up on her sleep from the night before. I had to wake her every 3 hours or so that evening to get her to feed.

Yesterday and today I have become more worried. She constantly sleeps, I have to force her awake to feed her (usually stripping her down to her diaper and trying to stimulate her awake). She never wakes up to tell me she is hungry (like NEVER, I always wake her up), every 3 to 4 hours I have to force her to feed. She always falls asleep while eating and sometimes will only nurse for 5 minutes, though sometimes it is longer.

Today she has become harder to wake up, she is rejecting the boob or eats very little and I feel like I have to sit and force it on her and she has started spitting up after and between feedings. Between feeding while shes in her swing or rock and play I'll notice she has a bunch of bubbles on her lips and sometimes she does this silent little choking and back arching and I sit her up but nothing comes out. I'm starting to think she might have acid reflux.

I'm mostly stressed about the fact that she doesn't seem to want to feed. It's been four hours since her last feed and I've tried to get her up but she instantly falls back asleep. She has no interest in my boob right now and just wants to sleep and I'm not sure how worried I should be. My milk has come in and one of my boobs just constantly leaks and both are definitely full and are tender. I have a pump and I'm not sure if I should pump or what?

Sorry for this rant. I'm overwhelmed and afraid my child isn't getting the adequate care she needs and it's my fault. I plan on calling her doctor in the morning but wanted to post on here to see if anyone went through something similar or if anyone had any tips.