<s>[INST] I have been very lightheaded and tired for several days now. I went to the doctor on friday and he advised a full blood screening to be done on monday. However, today I have developed a headache and what I can only describe as pixel vision . Like I am standing too close to a television screen. I have not had this since I was about 16. Due to this previous episode, I was taken off of the combined pill and put on progesterone only however I was also seeing a cranial osteopath for the same issue so I am not sure which was the help. I have had the implanon implant since 08/2012 and was on Cerrazette (progesterone only pill) before that. I am now 25 years old. [/INST] Thanks for your question on Chat Doctor. I can understand your concern. By your history and description, possibility of hormonal imbalance is more in your case. You are taking hormonal pills, so they might cause you hormonal imbalance and all the symptoms. Actually hormonal imbalance can cause stress, anxiety and mood swings. And all these can cause headache, dizziness etc. So better to get done hormone levels and if imbalance then change your hormone pills. Also consult psychiatrist and get done counselling sessions. Try to identify stressor in your life and start working on its solution. You may need anxiolytic Chat Doctor.  Don't worry, you will be alright. Avoid stress and tension, be relaxed and calm. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>