What Causes Frequent Smell Of Burnt Toast And Pain In Chest?

Hi,Recently i keep randomly getting a brief smell of burnt/burning toast. This has happened to me about 3 times over the past few days, with majority followed by a headache??on top of this I am also getting a few random chest pains towards the right hand side of my upper chest. This pain is not unbareable but has a slight sharpness to it.Any advise?