Are you not eating oily fish regularly? Pilchards/ sardines, mackerel and herring are excellent sources of bioavailable vitamin D, long chain omega-3s DHA and EPA and many other micronutrients, especially if you eat the crumbly bones in the canned stuff. Your 6s and 9s supplement may well be working against you because the US and UK diet contains an excess of omega-6s. These act in opposition to omega-3s blocking their beneficial effects, most are pro inflammatory which is not good for skin or hair health. The 9s are not classed as essential and again are abundant in our diet. Supplements should ideally be supplements only, they can never substitute for antioxidant rich wholefoods.

It’s not necessarily a good idea to randomly try everything, anything you apply topically may be diluted or fight with one another, nutrients usually work synergistically and in opposition not in isolation. Vitamin D for example work synergistically with calcium and magnesium in bone health, magnesium and calcium oppose one another in muscle contraction and relaxation, vitamin D and magnesium are both important in mental wellbeing especially managing stress/ anxiety. Your choices of topicals as just oils seem more oriented to hair health than skin (scalp) health, have you considered actives like aloe vera, ceramides, allantoin or panthenol? Someone on another forum whose scientific background and opinion I respect raves about sea kelp bioferment for skin health and hair growth and has ‘published’ recipes incorporating other proven actives. She runs this store if you are into DIY, references to published studies for many actives even if you are not http://stores.skinessentialactives.com/StoreFront.bok
If DIY is not you thing Komaza Care make largely natural products based on their own work (they offer scalp and hair analyses) as well as published scientific research http://www.komazahaircare.com/

There are strong links between stress (not only life events but unhealthy lifestyle choices, poor sleep patterns etc put the body into a state of stress) and systemic inflammation, between stress and nutrient deficiencies, between inflammation and hair loss. Whilst formal exercise is normally beneficial it also stresses the body out and increases your need for every nutrient, you might be safer initially increasing your lifestyle physical activity to the equivalent of 10,000 steps a day.

HTH.