I have a very swollen, red, and painful bump on roof of my mouth towards the back. It is a bit painful to eat and even to drink. I have been gargling with salt water which usually helps with sore throats, but this pain is not going away. I recently had a cold and this is when it appeared or at least became painful. The cold is almost gone, but the swollen bump continues to worsen - what should i do. Oh, and I m pregnant so trying to be careful about what I take.