Hi, I am a 27 year old female, ive had two children, one almost 5 and the other almost 3. I had gallstones and had my gall bladder removed. on the other side of my abdomen under my left ribcage i get these weird twitching feelings or fluttering. it concerns me. i also get whooshing pressure in my head if i lay on my stomach. I take only vit. d3 and no other issues that i can relate to this.