Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. First of all you should ask yourself, why you started vitamin D,cod liver oil along with a multi vitamin. Was these prescribed by a doctor? If yes, you should consult your doctor appraising him of the symptoms. If NO, that is the reason for your confusion. You are worrying too much about your health. Morbid anxiety about health and serious diseases is called hypochondriasis. You shall need psychotherapy treatment for it. Thoughts are there to come and that is the duty of the brain. let the thoughts come. You need to divert the thoughts to more priority ones. Means be busy and divert thoughts. Relaxation and meditation plays an important role in controlling OCD. Plenty of water, oxygen and exercise most important. For more psychotherapy techniques, You can post a direct question to me in this website. Include every detail as much as you can. I shall prescribe some psychotherapy techniques to control your condition. I am sure that the techniques should be a success. Hope this answers your query. Available for further clarifications. Good luck.