Not a typical one. More likely is it something else than pregnancy. If you are unsure take a test.
Short answer: No. It is possible to have diarrhoea during pregnancy, but the two are not related any more than having a cold or a mosquito bite means you are pregnant.
Yes.
anthrax
Yes.
That is what I have heard.
Diarrhoea
No
Headache is not a symptom of pregnancy.
Yes, it could be a pregnancy symptom. Take a pregnancy test if you miss your next period
Yes hot flashes of the face are a pregnancy symptom, but not a common sympton.
Malaria is not a symptom of pregnancy.
One pregnancy symptom is a runny nose. Your estrogen levels go up and increases your nasal productions.