Anyone else suddenly start working out and then overdo it to the point of exhaustion? 😂

I've never had a habit of exercising. This year, I had to take a break from work due to some health issues. So I figured, since I have plenty of free time anyway, and for my own health, I signed up for a gym membership and got a personal trainer. I don't just train when I have sessions; I also started doing basic stretching for half an hour every morning when I wake up. After core training, I do an hour of weightlifting and cardio on my own. Then yesterday, I suddenly felt dizzy, got a headache, and even felt nauseous. I felt dizzy when getting up from a low position after doing the basic core stretches. Turns out, my dad, who's a Chinese medicine practitioner, told me I've overdone it and am suffering from exhaustion because I put too much strain on my body all at once, given I had no prior exercise habit 😂😂😂