coeliac symptoms

I was diagnosed with Coeliac disease about 6 weeks ago and immediately started a Gluten free diet. I instantly felt 100% better, and all symptoms disappeared until now. I am now getting all the old symptoms back. Has anyone else had this problem? Im wondering if I am also Lactose intolerant, although the symptoms are not always after eating dairy products and I have felt so good for 5 weeks. Does anyone have any advise?