You are correct when you note that you cannot collect a scehdule injury award during the same period you are receiving wage loss compensation.
If you get a lump sum and the time period for which the lump sum rans conflicts with any wage loss, one will cancel out the other.
Without know what you other conditions are for which you are receiving SSD, it is impossible to tell if these would be compensable under your W/C claim. Remember, the tests for receiving W/C and SSD are very different and because you are receiving benefits for one, does not mean you are entitled to benefits for the other. Under SSD, you need not prove causation; under W/C you must show that your conditions are work related in order for them to become compensable.