Sorry you're feeling bad. It's horrible when you feel and see yourself looking not great.
One thing I sometimes do when I'm looking very pasty this time of year - I use fake tan, just to give a slightly warmer healthy look. The one I use is Clarins self tanning gel, which is more expensive but it lasts for ages.
I also cleanse with Superdrug Naturally Radiant hot cloth cleanser which very gently exfoliates (the whole range is good.) Then I put on a little moisturiser. When that's sunk in, I use the Clarins, very sparingly. I then apply a 2nd coat on my cheeks, which makes me look more healthy.
I prefer this to foundation as it's a more natural look, and lasts a while. I don't like lipstick on me, just use pink lip balm or vaseline.
How about some eye drops too, or Liz Earle eye bright on a cotton wool pad is soothing to eyes.
I agree with farmgran about using bright coloured clothes too, just a flattering bright scarf, perhaps soft pink or peachey pattern, next to your face can lift your look.
Hope some of these ideas work for you.