I have had my minera for a year and 6 months but I have been feeling sick and my belly is hard and looking like a baby belly.. I took a test but it said negative but I feel like I am some one give me advice?

The mirena is a good method of birth control but like all birth control, it is not 100% affective, you should always use multiple amounts of birth control. So if you have been having sex, then yes, you could be pregnant. A blood test will be the best way to find out.