Has anyone had upset stomach after Pfizer? I had my first couple months ago and my stomach was not right for a few weeks after. Settled then I had my second a week and a half ago and it's been dodgy again. Like ibs type, cramps then needing the loo, although not diarrhoea, just needing to go more often. I don't feel unwell though. Did a search and cant see anyone else posting about it, I suppose could be unrelated!