Hi there third trimester ladies,

I'm just 28 weeks today and the past few days I have been feeling this strange ache which is in the area beneath my right breast, and at the beginning of my ribcage (if that makes sense?), kind of above where my belly swells out. It's not constant, and is aggravated by moving my right arm up and over my head, or if I find my posture becoming a bit slouchy. Has anyone else ever experienced this sensation? It's almost as though something is pushing up and scraping near my ribcage - I had some vague idea it might be my diaphragm, but I honestly have no idea. It feels like a muscular kind of ache, too. Do you think this could just be my stomach muscles stretching, or something else? It's not unbearable, just slightly odd. I'd really appreciate any opinions on this!

Thanks!