Low b12 /folic acid

So iv had a right night mare of the past few months first kidney infection then sinus infection and then got a bug called h pylori bin treated with loads of different antibiotics/ omprozel had my blood work done coz iv bin feeling really ill and now im told my folic acid / b12 is really low and got to take folic acid tables for 4 months 🤦‍♀️ plz tell me that this will all get better I just feel so crap and run down and sick of taking tablets I’m already taking probiotics / in 20mg of Amitriptyline for my sleep wat can this affects as iv had headache missed period muscle twitches / pains pins needles and heart palpitations/ chest pains dizziness and other stuff that bin going on my anxiety is so up right now I just want to get better!!😞😞