u/yaks1500

I’ve been on the 100 for about 2 and a half weeks but I’m feeling really lethargic all the time? Is this normal after a dose increase? I feel like I can’t function everyday without coffee or I’ll end up feeling like a zombie. I don’t understand this though because I felt like it was working when i started it? And now i get headache and fatigue feeling. I’ve been on sertraline for almost 2 months. Is this normal?