No you don't! You have had a very stressful few months - your husband, your Mum, Christmas etc. Sounds as though you need to sit down for a bit and get your energy back. Impossible to do at the moment I know but in a few weeks when your Mum has recovered and hopefully your husband will be a bit better, it may be worthwhile to think about going away for a few days just to recuperate. You have been an absolute brick over the last wee while. Congratulate yourself and sit down when you can. Housework etc can wait a few days (or weeks!) to be done. Do the bare minimum in your house for the next week or so to give yourself a break.
Take care and look after yourself,
Bramble