Need Some Advice......

My husband just accused me of cheating. We have been together for 3 years and married for 2 months. I was in our spare bedroom taking the sheets off the bed to wash them( some of our friends spent the night and had sex in the bed.) I had the lights off and when I walked out he questioned me. He asked for my phone. And told me that I was acting suspicious. I responded with I haven't done anything, I didnt realize I needed the lights on to take sheets off a bed. So now he won't even talk to me. He has been married twice before and both of his exes have cheated on him. I am not a cheater and never have been.