Will it harm me if my doctors switch my ADHD and IBS medications?

Hello doctor,

I suffer from adult ADHD (attention deficit hyperactivity disorder) and IBS (irritable bowel syndrome). Due to IBS, I suffer from constipation, gas, bloating, pain during ejaculation, and reflux hiatal hernia. I am currently on 150 mg of Wellbutrin and 40 mg of Tianeptine daily. My physician wants to change Tianeptine for Citalopram by starting at 1 mg, increasing the dose by 5 mg to find the lowest effective amount, and adding Clonidine at a very low dose of 5 mcg. Wellbutrin is helping ADHD symptoms with waking up, motivation, and focus. But I am still scattered with difficulty planning, following through with work, organizing my day, saving money, and sticking to my diet. Also, socializing is difficult for me. While I enjoy being with people, I am easily stressed and overwhelmed, and thus tend to avoid gatherings. I have done a lot of therapy: cognitive-behavioral, acceptance, and commitment, which has helped. But I felt sociable and at ease on Moclobemide, which I had to quit because it made me too tired to engage. My physician has explained that Citalopram could help my IBS and social anxiety and that a low dose of Clonidine can reduce ADHD symptoms and increase decisiveness. I am concerned about potential interactions. I have had ADHD since childhood, which made my school life difficult. I also had a stomach problem most of my life, but symptoms became apparent when I was 18 years old. Along with these medications, I also take Modafinil, Metoclopramide, Ranitidine, Omeprazole, Lansoprazole, and Esomeprazole. Please help.

Thank you.