Something's up - there are other signs you're either not mentioning or have missed. Tune into yourself, your relationship, and if you're ready, ask yourself some tougher questions.
What will you do about it if your thoughts are confirmed? Who is affected and how by what your proposed course of action is? What will you do/say if you don't believe the explanations? What will be the reaction, do you think, to not being believed?
Really think about it and what you're prepared to live with (i.e. if you don't quite believe the answers, will you pretend it's ok and carry on as before?).