That sounds like typical anhedonic depression to me. Antidepressants supplements would be your best bet in this regard. St John's Wort is the most effective I've seen but make sure to only use it for limited times(Like 1 month max at a time for example) to avoid phototoxicity. Some amino acid supplements could be effective like L-tyrosine(for dopamine) and L-tryptophan(for serotonin and melatonin). Your symptoms look a lot like a dopamine deficiency, considering dopamine controls libido, pleasure/gratification, sense of well-being and clarity of thought. This is why powerful dopamine enhancing substances(like ritalin for example) tend to make people horny, feel an enhanced sense of pleasure in all activities, have tremendous clarity of thought and feel very healthy and overall great. L-tyrosine would be great for this. Caffeine can especially help with this as well. But at times, a dopamine deficiency can be caused by a problem with absorbing or metabolizing vitamins/minerals or other such issues. For example, if you don't absorb vitamin b6 properly, your brain will not produce enough dopamine and thus a dopamine deficiency occurs.
So try to get a multivitamin in your diet, get some essential mineral supplements like zinc and magnesium to make sure you are getting adequate levels of those. Try to look into iodine as well. Low iodine levels cause low dopamine levels, and supplementing iodine can correct this. Junk food, while it does boost dopamine levels right away, actually lowers dopamine in the long term, so try to cut those out as much as you can.
Sleep deprivation also tremendously lowers dopamine levels, even just missing 30 minutes of sleep makes my ADHD much worse I have found. Exercise is important too, with regular exercise able to increase serotonin levels to the same level as prescription antidepressants in certain cases.
As for actual substances and herbs to take, L-theanine elevates brain dopamine level and is good for you in many ways. It's found in green tea but I find that it's antidepressant effect usually works at higher doses. Personally, 300 mg of L-theanine(30x the dose found in one cup of green tea) gives me mild euphoria. Citicoline increases Dopamine receptor density and increase the amount of Tyrosine hydroxylase(the enzyme that converts L-tyrosine to dopamine) in the brain. Citicoline also breaks down in the brain into uridine, a compound that regulates and moderates the dopamine system in the brain. Rhodiola rosea is another herb that inhibits MAO-A, an enzyme in the brain that breaks down dopamine, serotonin and norepinephrine. By blocking(inhibiting) this enzyme, less dopamine gets broken down, and as a result more dopamine build up in your brain. Bacopa is another great herb for depression, it just takes a while to kick in, meaning you will have to take it every day for quite a while for it to work.
All in all, these supplements are mostly hit and miss. Some won't help, some will make you slightly worse and some will help tremendously. You just have to keep trying and don't get discouraged if one of them don't work for you. Good luck with getting better.
