Infidelity is a powerful test for any relationship. It can if not destroy love, then certainly provide a serious crack in the relationship and permanently deprive the ability to trust a loved one. I read an article about it at https://signscheating.com/signs-she-cheating/ . I , too, sometimes have a gut feeling, and for a while it really stressed me out. Until I downloaded a special app and made sure everything was fine and there was no cheating.