Hey Heidi,

This is very good news indeed; apart from the fact of the blocks themselves, something positive is being done for you, an uplifting of the spirits, you know - hope returns, and your sights move forward instead of that aweful feeling of stagnation, up against a brick wall.

Yes, they are usually done in 3s, and then adjusted according to how well they work for you - some people have a series of several more. But first things first, I really think this may make all the difference to you,
I really hope so, good luck with them!
all the best