Feeling sick

Ladies I need your help! I started feeling sick today and I can't get it to go away.

It's not like a morning sickness feeling. I'm not nauseous, my stomach just feels like its tied in knots and weak.

I don't know if this pregnancy related or maybe something else? I know I'm not hungry and nothing else is wrong. I just don't feel good.

Also, I'm 6 weeks almost 7, do I need to start sleeping on my left side now?