What would cause pain under lower left ribcage after eating?

I’ve recently started to notice an aching that starts under my left ribcage after eating a meal and radiates to the area surrounding it. It’s not unbearable but it’s quite uncomfortable and I can’t ignore it anymore. Are there any vital organs that could be causing this issue? I think the gallbladder is on the right side so I assume it’s not that. I’ll add that I’m 27 weeks pregnant in case it has anything to do with that.