I wondered about twins too given that I've been much more symptomatic this time. Being older, taller, multiparous, overweight, I know all these increase the risk but it's still tiny.
Although my symptoms do seem to have waned this week, but that may be due to me resting more and finding good ways to prevent nausea.
One of my worries with a potential hb this time is that my labours progress quickly. With this being my third it could all be over in under an hour! I'm going to talk to the hb team and hope they can give me assurances that they will arrive on time.
Anyone else had quickish previous labours?