The top front of my hairline has a tiny bald spot & I'm scared it's gonna get bigger?

The best thing to do would be to see a hair loss specialist with experience in hair regrowth and the re-balancing of body biochemistry. From there, the cause of your hair loss can be assessed and you can find a way to treat it. 
There are other natural ways other than castor oil and massaging that will effectively stop your hair loss and create hair growth. A personalized medicine catered specifically to balancing your body chemistry will be more effective and naturally grow your hair back. 
Such treatment is out there and you will see results. Good luck on your search.

You need to see a specialise in the field of hair, like a local dermatologist who can give you a diagnosis and then recommend treatment