Went to see the mw above who confirmed my suspicions re my abdomen. I wasn't well sometimes but thought it was pregnancy related or some kind of indigestion. She offered me a belt to "hold things together" and said that the muscles usually come back together few weeks after the labour, if not I'd be referred to physio.
She also advised seeing GP for abdominal pain that sometimes I'm feeling just under my ribcage.
What's next? I've got boisterous toddler to look after so I just have to pull myself together ( ha,ha). Anybody has any experience? I want to rule out the heartburn first just in case this one is different than the last one, if it doesn't help I'm off to GP. No horror stories please as I'm already scared shitless 
Thank you.