my legs feel like sacks of potatos

geez so for about a week now maybe two? idk... I've been feeling so much fatigue. mainly in my legs, it feels like I can barely move them. I'm not in any pain but everything takes so much energy. I find if I've been doing something that requires precision or like is moderately stressfull my hands start to shake and get quite weak

I have a sneaky feeling it's a B1 (thiamine) deficiency but i still need to see a GP about it to be sure

genuinely hate the feeling of exhaustion like girl you've done nothing all day why do I feel like I ran a marathon.

ive heard that being on Sertraline stops the absorption of b1 vitamin which is why I think its that, since the symptoms seem to be pretty on point... if anyone else is on sertraline and has heard or experienced this kind if muscle weakness and fatigue lmk bc I feel like im being dramatic aha