Could Erythromycin be causing this?

[AvocadoPrime]

Hi all.

I am on Erythromycin 500mg four times daily for mastitis. I've taken it for two and a half days so far. This morning I woke up feeling awful, being sick and pain sort of under my ribs. Feels like I'm bloated but at the top if that makes sense. The pain has persisted all day. I wondered if it was heartburn but ranitidine isn't touching it.

Anyone have any experience of Erythromycin?

Have you checked the patient info leaflet OP? The feeling sick and chest pain were listed on the one I just looked at.
I find I usually feel sick and have stomach pain when I take it.

Yes I've had a read. The more I'm delving into reading about it the more I'm convinced it's the AB causing the pain. Its horrendous.
I can't even concentrate. I will speak to GP tomorrow.