harman agree with the others START TODAY.
I felt like this at the beginning of last year.I felt a useless frump and just in the same old rut and wanted a change.I had let myself go.I was stuck in 24/7 and getting bored.
I started off with buying some sexy underwear (not for dh for me)to make me feel like a woman not just mum and wife.
I then progressed to gentle 5 min exercising and getting body toned up, and going on a sunbed.Doing my hair, getting new make-up and clothes etc etc.
After a couple of months all this came together and I felt like a million dollars.It boosted my confidence and relationship up tremendously.
Then the biggie I started to then go out to the pub and enjoy myself.
HTH
take care