Feeling weird

I was put on Cymbalta/duloxetine 30mg once a day for fibromyalgia and anxiety. I've been on it for 5 days, and the first couple of days, I was feeling very jittery, and my anxiety felt worse. Then last night, I woke up feeling jittery and felt like I was seeing things. I forced myself out of grogginess, and my head cleared. Then I couldn't get back to sleep for a bit.

I haven't taken my dose today because I'm scared.

Does anyone else have similar experiences?