Girls, Hi! I'm 36 weeks and 5 days pregnant, my belly has already drop…

Girls, Hi! I'm 36 weeks and 5 days pregnant, my belly has already dropped a lot, and every day it drops even more. Today I feel not so good, all day my head hurts, my back hurts, my whole body is aching, and everything irritates me completely and everything. Has anyone had this happen? Pregnancy isn't easy. Can you maybe tell me what it could mean? Because it's really strange, first time like this ? Thank you for responding ❤️