Ear pain while sleeping?

Ok this is super random but, since becoming pregnant when I sleep on my side and then wake up my ear is throbbing (whichever side I was sleeping on). I have to rub it and it's so sore! This may not be pregnancy related at all and may just be me but I thought maybe the increased blood supply causes it? Anyone else experience this? It literally feels like I had my ear boxed/punched!