I'd imagine you're overdoing things (quite understandably in your situation). I was told when released from hospital to go home and act like I was still in hospital for 4 weeks at least. This meant showering, dressing, going to the loo, sleeping, and getting food and drinks - nothing major. Was told not to walk too far, lift a broom or anything heavier than that. I ignored it one day and went out with DH and DD to visit my mum at work. Just getting in and out the car and walking a few hundred metres holding DD was enough to cause me a world of aches for the next few days, so it doesn't take much.