So I've been back at work for 5 weeks after having 7 months off following diagnosis of Hashimotos. I am now back up to doing 13hr shifts. So far so good but it did take a while to get used to them and I've found I have to be ultra organised to get everything done. Also noticed that I get brain fog kicking in around 1pm (shifts start at 7am) so making sure I get a break is essential and at the end of the day all I'm good for is sleeping and everything aches dreadfully. I finally had my b12 checked which was 145.03 (155.87 - 1355.4) my ferritin levels were 26 (20 - 300) however my monocytes, plasma viscosity, total white blood count and platelet count were all well over their high reference range, this is the same as 6 months ago. The lab results state that as these are high then although my ferritin levels are with range they are low enough to indicate iron deficiency. My TSH has now dropped to 0.1 (0.35 - 4.7) and t4 is 13 (7.8 - 21). I'm still waiting for advice from my GP about these results.