TMI? Early pregnancy

Sorry if this is the wrong group to be posting in but i have recently found out im pregnant (about 4 and a half weeks) and since i found out iv had diarrhoea... a wave of sickness comes over me and cramps n i have to run to the toilet.. its mainly an hour(ish) after i eat anything.... has anyone had this and is it a normal symptom? google is not helping? I had full on constipation in my first pregnancy and was fully expecting it again so this is making me feel something maybe wrong? Can anyone help? Thankyou