Ir look like you are having Pregnancy induced Hypertension
. If you are having fever
which will be present in two three days i suspect you have got an infection as well which is common with abdominal cramps and diarrhoea
. Kindly if diarrhoea persists and do a stool examination. You have to reconsult your Gynaecologist or aleast monitor your Blood pressure every 3 days till it come down. If its not coming down you might need anti hypertensive therapy.
My best advise is to consult your Gynaecologist as you need fluid correction without going for hypervolemia( accumlation of large amount of fluid in blood and tissues)