left side pain

I'm almost 19 weeks and when I lay down on my left side, starting literally yesterday, I get sharp sharp SHARP pain below my rib cage on my left side. It's NOT where round ligament pains would be- def have those. These are very sharp pains, I breathe threw them and it does help but I have to roll to my back or my right side because I cannot stand the pain. Has anyone else experienced this? I have terrible asthma and having issues with it lately but I don't think these two are related. Also my third pregnancy but my first two are 9&6.