What should I do?

I was doing laundry yesterday, went out and ran errands and then last night when I went to get the clothes out of the drier there was a woman’s shirt in the drier that is not mine. Side note we do our laundry at our home. There’s no one else that uses our washer or drier.

My husband was home while I was gone. I’m 100% positive that this shirt is not mine and was not in the wash when I put the laundry in.

I don’t know what to do about this. My husband has been acting super weird lately and there has been rumors that he was cheating but he continues to say that it’s it ex being “crazy”.

I haven’t asked him about the shirt yet. I just don’t know what to do.