HELP ME! Severe advice needed, wasted all my time

I'm sorry it's a bit long I'm one of those premedical students who took two gap years. Yep you heard right ✅️ first gap year I tried to focus on giving mdcat again and studied my ass off and did nothing else except studying and revising. Still the merit was too high and I wasn't able to get admission in any government university. Then people told me about NUST and how everyone is switching to CS so that's what I did. Took my second gap year and started studying like crazy again 🙃 did nothing except studying. Now university is about to start. I'm pretty confident that I'll get in the third list in nust but i also have backup. but the thing is I just felt like I've wasted too much time. Two years. People take gap years and talk about learning new skills and hobbies and talents and upgrading their health and lifestyle. But I'm fat and depressed. University is gonna start in September. Do I have time until then to turn over a new leaf? Is two gap years too much? Is it too late for me? Has anyone been in same shoes as me ?? What did u do to get out of this cycle. Is this time before university enough for me to start ?