Aw, get well soon mama! Citron tea is generally okay, pero since you're preggy at 33 weeks, mas safe kung i-check mo muna with your OB, especially if it's herbal or may specific ingredients kasi some things need to be avoided during pregnancy. A few of my mum friends drank plain lemon or ginger tea when they had colds, and it helped with the sore throat, so citron should be fine in moderation, pero better safe than sorry talaga, lalo na kang malapit na sa due date mo!