Burn scar is red still after a week, is it normal and should i do something about it?

Yes and Yes: To have a burn scar be red after one week is not atypical. It depends on how deep the burn is. The more superficial the burn, the faster it will heal. You should protect the area from sunlight. Often very superficial burns can be treated with OTC 1% hydrocortisone cream. TO be safe, if you have any questions, you should see a plastic surgeon who treats burns.