Hi , I Need An Orthodontist Advice, I Worn Braces

Hi , I need an orthodontist advice, I worn braces when I was a teenager. I know after using braces your supposed to continue using retainers to keep your teeth straight after the braces. I started doing that for about 3 months, initially my braces were taken during my first year of high school, throughout the other years of high school I stopped using my retainers because I thought I didn't need them anymore after 3 months of wearing retainers. Now I'm a junior in college and my teeth aren't as straight as they were in the beginning . There's a few minor small gaps like my in between my two teeth and its shift at the bottom of my teeth. But my answer were to ask you what should I do , or do I need braces again ????