Swing issues since weight loss

Hey guys went to the range today for the first time since losing 60 lbs and noticed I couldn’t figure out my swing. No more working around a stomach. I hate to say it but it was like I had never picked up a club before. Any suggestions on what to do? I have been playing at an amateur level since I was a kid I’ve never been great but I’ve always been decent enough to get off the tee box and work my way to the greens. Today was not the case