Heel Spur pain

I've been having pain in my heel for exactly 10 days now. Ive been dosing myself with ibuprofen and rubbing arnica on my foot but still when I walk my foot pains. Not sure if it's a spur because it doesn't feel like a sharp pain, just a dull constant ache and if I press around it it's very sore. I walk for exercise and I'm feeling super frustrated because I now can't walk properly and keep compensating by stepping differently on my foot. Any other things I can do to make it get better??