I have this bump/lump on my shin I think it's a bruise but it has been there for about two weeks sometimes I feel it sometimes I don't and I can't work out if I'm like making myself feel it or making myslef feel like my leg is aching if that makes sense. 
It doesn't move and is hard and about 3cm long I'd say it's hard to tell I've booked a gp appointment but I'm convincing myslef I've got cancer in my leg my appt is nearly 9 days away and I'm getting so worked up