Forced to take break because of strange body pain

I was supposed to start third week of Fb Abs r2 (6th week of Strong-Abs combo). But these days I am extremely fatigued. My calves, quads, triceps, elbows are always aching. It's a bit different kind of soreness than the usual post workout one. Yesterday being on the beach area all day made it worse.

I actually don't know what's wrong with me. This pain gets worse at late night and early morning, it attacks side ways, sometimes right leg-right hand, sometimes left leg-left hand. Maybe it's some flu that is not attacking my body completely, or this exhausting heat of Australia, and then temperature drop at night, really no idea! Anyone ever experienced such pain and fatigue?

I pushed through it and exercised all last week. But today feeling really drained. I will try tomorrow.

Edited