Suggest Remedy For Weakness,dizziness And Chest Pain

Hi, This past week in the late afternoons at work I have suddenly come over all faint, weak and dizzy and feel the need to eat something with sugar to try and make me feel a bit better. I have also felt constantly tired and have headaches even though I have had enough sleep. I also keep getting a chest pain at the top of rib cage at night too.Work has been hard too and I have felt a stressed and work but I dont know if this is even related. I asked my parents and they said I should ask a doctor as they were concerned that I may be diabetic as it runs in the family or a lack of iron. Please can you help as I just dont feel myself. Thanks Nikki