I really need some help/advice please!

Since my son was born, the only thing he would sleep in was his swing. He is now 3 months old and we are starting the transition from swing to my bed, pack n play and eventually his crib (flat surfaces). He takes his naps in the day in his crib and does great. However, at night he starts out in the swing at 7:30 and will sleep till midnight. Then that is when I feed him (breastfed) and put him into bed with me. He is then up at 2, 3, 4, 5 and finally up at 6..... yes, EVERY HOUR! I’m beginning to think its my milk supply and maybe he isn’t getting full enough or even enough. He has also been spoiled with the swing since birth. Please help with any advice as this mama is very sleep deprived and has been since day 1. Will it ever get any easier :(

Picture of my little man: