Letting go is good.. the day DD2 was born i cleaned my entire lounge (lifting and moving couch included) and played outside with DD1, sat on the ground playing with chalk and in her sandpit.. the pains i had thought were nothing as they weren't anything like DD1's.. ah yep WRONG.
Relax and enjoy your 'ummy' time with your DS.. you never know it might just be what you need.