Have been wanting to say something to therapist and doctor for a long time but each time i can't, is it acceptable to write or is this too weird ?

No, Not Weird.Honest: This is the age of e-mail and it shouldn't hurt to ask if you can send them something that way.That may start a meaningful conversation. If you don't have e-mail then you could use handwriting and take it or send it to the doctor and therapist.It's too bad you don't feel comfortable talking face to face,but that happens.The important thing is to settle whatever issues you have. With anyone, really