Navy&Army Vet

Hello everyone Navy and Army Vet. I just wanted some advice on TDIU 70% PTSD 10% for a wrist fracture 0% for right calcineal spur with pes planus 0% for pes planus (claimed as left foot condition) 0% temporomandibular joint disease (TMD) with bruxism, myalgia and disc displacement Currently was denied for tinnitus and headaches. My main questions are 1) If I apply for TDIU, will my current claims for increase and appeals continue its process and will I be able to get a rating for the increases and appeals while under TDIU? 2) If I achieve my 100 % schedular through all my service connected conditions will my TDIU drop? 3) If I do get TDIU and I get my appeals approved will I get backed pay on my appeals back from 2009? I am also receiving SSD. Thanks for the help.