Have I went too high?

Hi all started sertraline - was on 50mg for about 9 weeks (noticed marked improvement in anxiety but still had some anxious thoughts at night so I thought I’d increase to 100mg dr agreed) I’m just over 2 weeks into 100mg and I’ve felt worse since; mood has felt a bit low at times not depressed but kind of blunt and I’ve noticed I’ve been feeling really anxious again the past few days AND my libido had disappeared, I’m thinking of going back to 50mg again as it was doing well and if I need to increase at some point go 75mg ? What’s peoples thoughts, would this indicate a dose too high for me ?