Hi all. I've been on NP thyroid for 18 days now. Some of my symptoms are gone, but some aren't. Have back pain all on the left side (shoulder blade, mid back at bra line, and flank). I also have left rib pain, freezing feet and ankle pain, horrible fatigue, etc. I can't help but go to the worst and think I have cancer or something horrible. I guess I'm just looking for people with thyroid issues that have had the same pains and symptoms.