I've had this problem for months now, and I'm 6m pg. My left ear keeps blocking up. It unblocks for a few seconds when I swallow or lie down but it's very annoying. Any experience? google says it could be anemia but I take pronatal tablets everyday, and they contain iron. I also saw it was pg related. Am I condemned to wait until the birth ? Oh, and I'm also very tired, it could be linked.