Do I need to consider getting braces again? (photos)

Hello! After my treatment with braces on my early teens, I've worn the (removable) retainers as prescribed for a few years until the orthodontist felt like I could stop wearing them. However, I didn't get fixed ones afterwards, and, some ten years later, I feel like my teeth and bite are slowly changing again. Can this be? Should I consider getting braces again? Thank you!