Wow, hope you're starting to feel better, Dude.
I know there have been others that have had some issues with the pro-peptide. I read at promuscle that it also contains an amino acid (which one I don't know) to aid in absorption, and that's where some have reported the particles that don't dissolve all the way. I personally don't buy that explanation. The components themselves don't need anything extra IMO. Some have gotten nothing in the way of results and similar flu-like symptoms. Others like myself have seemingly good results from the follistatin. I originally trusted the place because one of the owners is Phil Hernon. I have the feeling that they probably had some real stuff but depleted their supply and possibly sold a "filler" to everyone afterwards.
One thing I need to note, and this is not in any way a defense of the company, but this is something everyone should be aware of when using something that inhibits myostatin:
Stopping myostatin for real does increase muscle, BUT it also decreases fat. If one has a higher bf percentage, it is unknown how much it will affect this versus the muscle gain, so this can be one reason for a weight loss instead of a weight gain while inhibiting myostatin. I originally noted with my acvr2b usage (which I know was real stuff direct from the pharmaceutical company), my weight went down from a bf loss although my muscularity also increased. I think IMO that it set the stage for later gains.