hi Completely, welcome to the boards.......
When did this side effect start happening? Something trigger the memories?
I don't think you are developing straight tendencies, esp. not when you've been with someone for 14 years. There are always times when we wonder if we've made the right decision and may question it, but deep down you know where your preferences are.......
Try to work thru where your thoughts have been coming from and deal with those issues. I wouldn't mention it to your partner, esp. if/when you work it out within yourself.
Take care.
Mary Alice