Ay, mamsh, I'd personally check with your OB tungkol dito kasi buntis ka pa lang at gusto mo sure talaga, ang caffeine at sugar sa milktea, depends kasi sa dami at kung gaano katipid mo overall during pregnancy. One of my mum friends said ang doc niya allowed minimal caffeine lang (like 200mg a day) pero strict siya with milktea dahil sa sugar, lalo na kung gestational diabetes risk, kaya better safe than sorry!