TSH level is high. Are side effects?

Hello , I am taking Eltroxin 25 mcg medicine aa per prescribed by my doctor because my TSH is 7.73 as per test . It's been almost 25 days I am taking this medicine regularly empty stomach but I am feeling some issues like first Initially i was experiencing static current while touching any thing even very much dey skin . Now I m facing extreme muscle cramps , suddenly joint pain , leg , feet , elbow pain .. please suggest these are side effects ?? And along with this medicine I have b12 and vitamin D deficiency for this also I have taken prescribed injections like only 1 dose I have taken for vitamin d -Arachitol -6L 15 mg and MeAxon plus for B12 _i have taken 5 in a week ... it's been almost 2 weeks I took this injections .. I was all ok after taking these but it's been 3-4 days I am facing more muscle cramp m sudden pain ..