Hi,

It's perfectly normal for new moles to appear and old moles to disappear up to the age of 40. After that, they are treated a little more suspiciously. 

For your peace of mind I would take a photo of it and do the same again every 2 weeks for 6 to 8 weeks. Put a ruler by the side of the mole. In this way you can monitor if there are any changes in the size, colour and shape. If there are any changes then see your GP. If it doesn't change, just keep an eye on it monthly for a few more months. Hopefully it's just a new, benign mole.

Angie (Stage 3 melanoma patient since 2009)