No symptoms?

So I am now 6 weeks pregnant, last week I had cramping, really bad diarrhoea and the feeling of vomiting, I was bleeding from the bum at one stage and really feeling pregnant for about 2 days now I have just a little bit of cramps and my boobs are only just starting to become tender. Is this normal? This is my second pregnancy, I had a miscarriage in the past? Anyone kind of had there symptoms get better??