Sayang, please call your doctor or clinic BEFORE esok's appointment , they need to know you're 16 weeks pregnant and confirm kalau booster is safe for you right now, okay? Don't go tomorrow without checking with them first. Among a few of us mum friends, some had mild arm soreness or slight fatigue after booster, but lain-lain fine je. But pregnancy changes everything, your doc is the one who should advise whether it's the right time for you. Better safe than sorry, kan? Let us know what they say!