I've only been sick about 4 times the whole pregnancy and the other night out of nowhere I woke up with terrible heartburn then was violently sick for about 15 minutes. I've had plenty of movement since then but people keep telling me to get in touch with my midwife/doctor. Should I do this or just wait and see if it happens again first? And could it be a result of having a low lying placenta as it will be pushing everything up a bit? Any advice would be great :)