Stormie =
One way to deal with the crack and lifting is to rent a concrete saw, slice the cracks wider and lift out the concrete. Level the sand under that area and drop the concrete back in.

OR rent a concrete grinder (like a sander, but for concrete) and level that area by grinding it flat.

If you do either of these, make sure your dust mask is a REAL one that is listed for concrete and masonry dust. The cheap ones won't do the protective job you need.

If you make a pattern of slices and plant some grounbd cover in the new gaps it can look planned.