Im a healthy person, but i have really bad health anxiety.every time my hands get cold or i feel tired i instantly think i have anemia. if i get a couple bruises i automatically assume low platelets. i do his cycle every day. could an ssri help?

Yes, there are medications that could help, but these result in symptomatic relief, not permanent cures. A couple alternative approaches may be longer lasting, providing tools to deal with this. Consider seeing a psychologist for cognitive-behavioral therapy and adding on biofeedback therapy. Meditation and aerobic exercise also can help.

It is not feasible to provide an opinion without additional history, physical examination may be some tests. It would be prudent to see your doctor to see if you may be depressed. Depression is treatable. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!