Thank you for asking your query at DoctorSpring.
No these are not specific or suggestive signs of pregnancy. And it is almost impossible to get pregnancy from what you have described. There seems to be no direct ejaculation or contact with semen. So no reason to worry. The cramps and diarrhoea seems to be unrelated. This probably a gastroenteritis (stomach bug). Drink plenty of water. It should resolve by itself in couple of days.
Hope this helps
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