Information please

Hello everyone, my girlfriend was diagnosed with hypothyroidism recently and I am wondering what type of changes she can expect when it comes to being on her period or her daily life while trying to find a good balance with medication. I got this app so I can be more in tune with her body and help her to learn more about hypothyroidism. She takes 100mg of levothyroxine every morning. I don't know if that helps anyone that can give any information. Thank you all for taking the time to read this and for your help.