Hey Heather it’s totally normal. Did you have unders? Its a mixture of healing, anaesthetic coming out of ur system and the codiene I know when I took codiene I slept for 2-3 hours after I kept napping it was frustrating. I’d say u can slowly do more things by day 5-6 but then for me the backache happened but it did settle in like 3-4 days but had to take 2 weeks off work, as you said little things are exhausting. But everyone is different so hopefully urs will be a bit quicker but ur body will let you know when ur doing too much u don’t want to rush ur healing. Good luck and congrats on ur new boobs 🙂 xx