A., assuming that your other post was a response to this question, it sounds like he just has his days and nights mixed up, which is totally normal. And crying during his waking hours, also totally normal. Is this your first baby? The first few days can be so overwhelming. Sleep when he sleeps so that you're not as sleep deprived, and trust that in a few days, he'll figure out that daytime is for waking. Try to get him on a schedule where you are feeding, changing, and having some play/awake time and nap time in the same order over a period of several hours. Try to have that play/awake time during the day be longer and more stimulating than it is at night. Keep the night awake time dark and quiet. Eventually his days and nights will reverse.
Also at 3 days old you've already introduced two different formulas? If breastfeeding is an option and he seems like he has a sensitive tummy, perhaps breast milk will be easier for him. Your milk should be coming in now so it's a great time to try if you can.
Also if you're already home, can you get an appointment with a visiting nurse? A nurse might be able to check him out and give you some tips on whether or not there is something to be concerned about or if he's just a typical newborn getting used to the world. It's a big adjustment for everyone, hang in there!