Idk why

So lately, I've a loss of appetite. I don't understand why, because I love food. And I find myself forcing meals instead of being hungry or anything like that. It's kinda frustrating because I love to eat and I don't find myself as hungry as before. 

Today's workout: 

Cable row: 4 sets 20 reps 45 lbs

Lat pulldown: 4 sets 20 reps 45 lbs

Diverging row: 4 sets 15 reps per arm 30 lbs

Delt flys: 4 sets 20 reps 40 lbs

Bent over row: 4 sets 20 reps 30 lb barbell

Pull ups: 4 sets 6 reps

Standing cable row: 4 sets 20 reps 32.5 lbs

Face pulls: 4 sets 20 reps 27.5 lbs

Cardio:

22 mins elliptical