Need some dog advice (graphic images)

chantelle

So a few days ago i was stroking my dog and felt a lump on his back, its on his skin and can move it side to side not very hard. Just now i have looked and noticed its been bleeding. Isnt any smell and sunny doesnt seem to be in any discomfort.

Tried to take him to vets and they said for next week but i need some advice, support and reassurance. Also sorry for graphic pictures x