It could be hand, foot, and mouth disease which is common this time of the year- although mostly in children, you can get it as an adult. It is highly contagious, so you will want to be aware of that- there isn't much that can be done to treat it other than to help with the sores if you have them in your mouth especially- so it may be worth a trip to the doctor to confirm that is what you are seeing and get some assistance with pain relief from the sores if needed.