Labor or not

I’m in need of some help. I didn’t go into labor naturally with my first two pregnancies I was induced. I’m currently 36 weeks pregnant with my third baby and I’m starting to feel so tired I don’t want to move, I’m feeling nauseous and if I move too much I hurt more. Yesterday I had what felt like stabbing in my vag and I don’t know what any of this means really. I also was having contractions during my NST yesterday. I need to know what others think and if there’s anything I should be doing.