I'm 4 weeks after my FUE, I am shedding right now my hairs are bent and they shed in L shape. Is that normal?

Remember that post op shedding of the transplanted hair is perfectly normal and anticipated.  Most if not all of the transplanted hair will shed within the first month or two.  Many patients examine the hair as it falls and worry if the whole hair and follicle actual fell out.  This is rarely the case.  The window of losing transplants this way is really the first few days.  When this happens, there is also usually some associated bleeding.
The shape of the hair that is shed doesn't have any bearing on the outcome.

Shedding after a hair transplant is normal. The grafts should look normal without an L shape to it. You might want to ask your surgeon about it