Op it's not your age I'm only 4 years behind you and I feel great. You need to tackle these issues one at a time.
Alcholic is crap. It makes your skin crap. It makes you bloated. It makes you eat more as it's causes your blood sugar to go all over the place and has an impact for even days after. You need to stay sober for about 2 months to feel full benefits. You don't have to just drink water, drink low calorie sugar free squash, drink tea and coffee but don't add sugar. Sugar wrecks your skin and energy levels.
You will lose weight just from not drinking at the start would be my guess. When you do it's a good idea to use the motivation to start ti tune up your diet. I did this, quit drinking, lost weight, decided to watch what I ate, then I started doing yoga. And now I'm gym fit with abs. That seemed a million miles away to me at the start, but just do one thing at a time. I promise the drinking is ruining your sleep as well as sucking your energy. Start with that.
If you want to be single you can be haha.
With the tooth, overseas dentistry gets a bad rep but I've had amazing dental work done at private clinics in Poland for a fraction of the cost of here. If it's a root canal you need, or something similar, you won't get botched going to an overseas dentist with a good reputation and it will cost about 200 to 300 quid max. Cheap flights ryanair are a bit rough but they can be as cheap as 20 quid each direction and it's such a short flight it hardly matters. Go and make a weekend of it. I've never felt bad enough after dental treatment for it to ruin my day, you would be able to go to the museum the theatre etc. leave kids with dh.
Get on the iron supplements and b vitamins complex. All of them. Every woman I know is low on b vitamins. If I don't take mine I get angular chillitis and patches on my tongue, feel like crap and my knees hurt which makes exercise harder. I was feeling dizzy and unwell a lot. I felt better immediately when I started the b vitamins.
I often think that even when I feel crap if I do something nice for myself I 'scrub up well' I probably look exactly the same but it boosts my self esteem. Long bath, hair mask, paint toe nails, tidy up eyebrows. Gua sha which is like a fancy face massage you do yourself, it feels really nice and makes my skin less puffy and is good for lymphatic drainage. Use a nice face cream with it. Wear something that you feel good in, I get in ruts where I get in a pair of joggers and just give up on life, take the joggers off and tidy myself up and I realise it was mostly in my head.
Take a bit more time for yourself. Do things you enjoy, that makes you feel good.