Hi,
Welcome to ehealthforum,
It is difficult to comment on the symptoms (sores) that you describe without examining them. Do not ignore your symptoms if they have been spreading and getting worse. Visit your doctor at the earliest for examination, blood/serological tests (as indicated by examination findings). Treatment as appropriate would be started to help you (based on examination findings and investigation results). Drink plenty of water. Be in regular monitoring and follow-up with your treating doctor and report any unusual/new symptoms immediately.
Take care.