Anxiety is most often triggered by a lactate build up. Although it can also be triggered by excess epinephrine if there is a lack of acetylcholine to balance it out.
Depression can occur for a number of reasons. Low serotonin, low dopamine, low norepinephrine, low adrenal or thyroid function, low prostaglandin levels, high progesterone or prolactin levels, hypomethylation, etc. In short the information provided is way too limited to even start making recommendations.