Aww, congratulations on your pregnancy, mesti nervous sikit after what happened before, yang mana normal je. During my first trimester after a scare, I just did light walking (15-20 mins daily, very chill pace), gentle stretching, and prenatal yoga from YouTube, nothing intense, just enough to feel moving but not breathless. A few of my mum friends who had similar situations stuck to swimming or aqua aerobics because the water supports you and there's zero impact, which made them feel safer. Honestly, this early on your doctor knows your history best, so it's worth having a specific chat with them about what activities they're most comfortable with for you , everyone's situation is different. Hang in there, you've got this!