I'm nearly 37 weeks and have been feeling nauseous and backachey all day. Have upset tummy as well. Went for monitoring this afternoon as LO was quiet (he's fine) but the midwife did say I was having A LOT of BH. Is it possible that this is just my body warming uo as opposed to illness? I don't feel fluey, just a bit...periody. Can you tell that this is my first?