They symptoms you listed can be side effects of the medication you are taking.
I agree about remodeling! Breathing a little better. But body feels better too.
JimCutillo, If you are taking Orenitram you may not be tolerating it well. I had a miserable time with Orenitram. Horrible face flush, pounding headaches, low oxygen so my heart would pound, body pain, stuffy nose so I couldn't breathe through the Oxygen cannula. Get the Dr to switch you to Remodulin. It is administered by infusion so not easy or very convenient but the side effects are WAY better than Orenitram and it works better. I breathe much better on it.
Do you eat a lot of dairy products if so try to push away from them and you will see improvements.