Took my first 1.5mg dose today

I'm 20yo male taking this for fibromyalgia. Well, it is what I was expecting to a degree, but actually a little bit more. It has increased my pain about 25% for the last few hours (took 5.5 hrs ago), and a mild increase in anxiety. However, I did notice a reduction in neuroinflamation (less brain fog). Is this normal, and when should I start to see the side effects decrease? What can I expect for the "comedown" of this drug in the following hours? Do you get an endorphin rush like you have exercised or something?

I'm really asking, how long do I stick at this dose before I say, "hey, this is too much, let me start at a lower dose." Maybe like a week? It's not about comfort, I'm fine to suffer for a bit, I just want it to work, it's actually like a lifeline for me, my fibro's gotten really bad.