Hello
Sorry that you are in this freak out mode! Straight to your GP as you need to know and have peace of mind
as to what it is or is not!
Since you're on Google and that is not a good thing to do, it does your head in, there's a egg carton called know your lemons, talk to your GP about this as well as and share with friends. Hopefully it isn't anything but until you get it checked you are in a world of freak out!!

Best wishes and take care and know that we will be here to help you out or have a collective sigh of relief