Vitamin B/Anxiety/TTC advice please

So I've been dealing with alot of anxiety since i lost my baby in April, to make a long story short..after therapy and 4 months of Ativan, I was diagnosed with hyperthyroidism. 4 nodules were found on my thyroid and i had a biopsy done Friday to rule out cancer. I tried to ween myself off of my Lorazepam and made it 3 days without it but the side effects drove me nuts and i ended up taking it. I take .5mg as needed and normally only need 1 to get through the day. My thyroid has also went back into normal range but the nodules are there so idk. I've been doing alot of research about natural ways to deal with stress and anxiety and the biggest thing i deal with is depersonalization disorder and I've been having vertigo and headaches but the vertigo didn't start until i stopped the ativan. ANYWAY im not trying to conceive, but I've been doing research and came across Vitamin B complex. I remember taking it for a month before i conceived my 1st daughter who is now 3 but i cant remember much besides it making my pee orange lol. I read that its beneficial for stress and anxiety and other things. I have PCOS as well. I only considered taking this again because my labs from last week showed slight vitamin b deficiency. I am anemic and always tired and weak. My question is, has anybody ever took vitamin b and felt an over all change in their mood/health etc?? Im really tired of this and no matter how many CTs i get, im convinced that my something is wrong with my brain..im completely healthy according to labs and everything besides my thyroid issues but this anxiety is ruining my life, and to make it worse, my babygirls due date is less than 2 weeks away. its bitter sweet right now and i was 19 weeks when i lost her...thank you in advance for your advice 🥰