I'm a 29-year-old male, and currently taking Amoxicillin for a bl...

I'm a 29-year-old male, and currently taking Amoxicillin for a bladder infection. This is the 4th day taking it (500mg / twice daily). So far, the side effects I've noticed are insomnia, nightmares (when I do fall asleep), gas, and have recently developed this very weak, achey sensation in the front of my shoulders. You when you've been walking or standing so long that your legs ache the next day and they feel worn out? That's the type of weak, achey feeling I can compare the sensation to. And it gets worse when if lay on my sides, so it becomes even more difficult to fall asleep on top of the insomnia. Good news is my bladder infection has seemed to vanish after only the second day of taking Amoxicillin, so I'm thankful for that, as the bladder infection was very painful and discomforting worse than these nagging side effects from Amoxicillin.