Ash,
Not having read your other posts, but reading the responses to this one, it seems you have some serious anxiety concerns.
If the testing hasn't revealed any medical basis for concern for either you or the baby, it would be a great idea to consult with a behavior and anxiety therapist who can get you some treatment immediately.
Anxiety can and does cause all if the symptoms you are describing. Fear and worry makes you hyper focused on each new ache, pain, or feeling, raising your anxiety even further, and increasing the perception of what sound like normal pregnancy body changes.
It is normal to have increased muscle, joint, ligament pain as your body changes, the baby grows, and your body prepares to carry the additional weight, and prepare for the birth.
Your headaches can be caused by two things, surges in hormones, and your anxiety level.
Please, talk to your ob/gynecologist, and consult with someone who specializes in treating anxiety, so you can enjoy the remaining parts of your pregnancy and look forward to this new life you will be responsible for.
His/her mother needs to be as healthy and well as she can be.
Sweetie, I think you need to talk to your doctor about your high anxiety level. Hormones can make that worse and the fear is it will get even worse once you deliver the baby. You filled with irrational fear at this point. Please talk to your doctor. Your ob/gyn is supposed to be looking or this type of anxiety to help you. Let us know how we can help too.
Your first thread in the HIV forum was answered that you had zero risk, yet you continued to worry and kept posting new threads there, instead of accepting the advice.
Consider therapy to try to deal with all the anxiety in your life, and print off all the posts you have made in the other forums so the therapist can get a good idea of the situation. No one here can provide one on one therapy.