I can only imagine your anxiety! Unfortunately, I have read that patients who are over 35-40 years do experience more side-effects during treatment. If you have latent TB, you do need treatment to prevent the disease from becoming active.
I'd like to introduce you to @flor@danielad @jewl8888 @jjgardner and @melissa23, who've shared their experiences, and I hope they will join in with some more information for you. May I ask you to share more details about the medications you've been prescribed?