Matt doesn't know, obviously, that some people on here ARE doctors and nurses.....
Do you eat well, rach, do you dress properly? Many of us have had a runny nose etc for weeks this year, so you might just be suffering a long-term cold. I'd see your GP, they might prescribe decongestants or a nasal spray. If you have head pain, it could be infected sinuses, that can be very painful. If you don't want to see the GP, go and see the pharmacist at your local chemist, they will suggest over the counter remedies for you. Echinacea works from some, but to keep colds at bay, not to stop them once you've got the virus.