Maybe you should see a counsellor. You can google for a family service center near you or a religious center counsellor if you have a religion. Have a heart to heart talk with someone and not keep everything inside your heart. This is not good for you. Maybe you can go for a holiday with your family and take a good break. It is normal to have some feelings of doubts. I think most women do but if you start to be suspicious even before you ave any evidence, then it's not normal. Focus on the good and the positive ok?