Hello and WELCOME
Seamz80!!!
I have certainly been where you are! I entered my 20s around 150 and from around 23 until now, 27 have slowly gained it all back plus more. It seemed to happen all at once though like you said. Until I looked in the mirror and saw a reflection that doesn't look or feel like me. This journey is hard but staying the same is also hard so I am choosing the hard that gives me the best version of myself. You can do this - everyone slips up now and then but making a good choice after the slip ups and continuing down a healthy path rather than just giving up is what will make a huge difference.
I look forward to chatting with you on the boards and I hope you are having a great week so far!!!!