Am 24 weeks and had my jab last Thursday. Sunday morning had tummy ache and a generally grumbly belly, by Sunday evening had diarrhoea and still suffering today despite eating only plain toast to try and improve it. I can't see how it can be a bug as I haven't been near anyone with Covid, and I am very careful with making sure I wash fruit and veg etc/haven't eaten anything out of the ordinary. Plus DH is fine and we have eaten all the same things. Has anyone else had this as a reaction to the jab?!