Anyone know what this is?

I’m 5 weeks If I am pregnant and I say “ if I am “ because I keep getting really faint positives. Anyway I know that the baby would be too small to feel kick and don’t have legs yet but I really want to know why I’ve had a twitching in my lower left abdomen that has litterally not stopped, it’s been going on for hours. It’s like a pulse almost but my own pulse is faster than it. I don’t know it’s really annoying me now and google isn’t giving me clear awnsers. It moves so like if I was laying on my back it would be in my left lower abdomen but now I’m on my side it’s the right. Have any of you experienced this ? Does anyone know what it is ( definitely not gas) or why this is happening? If anyone can help me out it’s appreciated