Is my ferritin level (301 ug/L) the cause of my plantar fasciitis and my two feet that turn blue when I sit for more than 5 minutes (poor circulation)?

I am prediabetic, my fasting glucose for 10 years varies from 5.1 to 6.4 (last result 14-11-2017 : 5.6) My HB1AC varies since 10 years : 6.3% to 6.7% last result 14-11-2017 : 6.7%. I never took the medication for diabetes because according to my doctor told me that it is not alarming yet. I do not have high blood pressure, no heart disease. I weigh 100 lbs and 1.50 m I suffer from insomnia since 2015. Lumbar osteoarthritis since 2008 and cervical osteophytosis for 1 year; Osteopenia for a few years, irritable bowel for a few years Medications : Crestor, Syntroid; promettrium; Actonel Treatments received for Plantar Fasciitis: orthotics prescribed by the podiatrist, cortisone 40 mg Kennalog; acupuncture; laser, utlrason, physiotherapy, exercises... Thank you