It is normal to feel tired but you should not stop, definitely continue and you will see that you will feel much better after a few days. I did not realize that you can see so many changes in your body so soon, but wait for a month and continue some exercises including push ups, I hope you will see more changes in your body and your body will feel much fitter. But gradually increase the push ups, try to complete 100 in a few sets.
Even a month is enough to show progress. If you're training properly, you'll see results in a short time. Training, nutrition and sleep all work together as a whole. If one of them is missing, it's harder to get results. When you live a disciplined life, you may get tired but you'll reach your goals quickly. After all, there's no gain without effort.
Another 200 for me.
100k,EFS,97,15500,2025-07-21