Eye swelling regularly, headaches, runny nose?

So my right eye has been swelling regularly ( 3-4 times a week), and at first I thought it was an allergy, but allergy medications don't seem to help, and there's nothing that I eat or drink on a daily basis. Also, when my eye swells, I develop a strong headache and a runny nose. I've already booked a GP appointment, but I just wanted to see if anyone has a clue what could be wrong with me?

By the way I've had this for 1-2 months now

Have you changed your washing powder recently, or has the manufacturer changed the formulation?  [it only has to have 'new' on it for the formulation to have changed!]

No, nothing new

The eye swelling could be caused by excess edema in the tissues near the eye.  You should visit your ophthalmologist for an examination right away.

Let's hope the GP comes up with something & ifnecessary, refers you to an Ophthalmologist.

Good luck!