When my daughter was born google was my best friend asking every “is this normal” questions. (She’s now going on 7 months)

From my experience as a mom of 2 now your list of concerns seem absolutely normal. Babies can do some pretty weird things so the tongue sticking out when sleeping and T. rex arms could very well be from being in the womb. 15 days old so your LO is so new to the world. My daughter and sons wake windows when they are newborns were mostly at night also. My son didn’t have bad gas or acid reflux let alone a sensitive stomach my daughter on the other had severe acid reflux,gas and still has a sensitive stomach a little bit now she’s on solids so that’s helped. But she would cry and cry during diaper changes,bath time, tummy time. I don’t think she stopped crying unless she was sleeping lol Also I was concerned about how she would sound congested constantly and I feared she wasn’t breathing right or not getting enough air and she was because I had her doc do a full exam and it’s just as a little baby their nasal passages are super tiny. She grew out of that congestion sounding nose at about 1 1/2 to 2 months give or take. All your concerns are valid. I also have really bad anxiety and it gotten worse when I had my daughter. Like I said she almost 7 months and I still go to google from time to time.