First time SSRI user and I put off starting this medicine from typical fear of the side effects. I finally dove in and took my first dose two nights ago (10mg) Woke up the next morning feeling great, no anxiety, no side effects. However this morning I woke up after the second dose with extreme anxiety- feeling quite a bit out of it and almost scared to be left alone. A bit of darker thoughts - such as what's the point if I'm just never going to feel better/feel like myself again. I ended up taking a .25mg Xanax almost immediately after waking up which I only cave in and use during extremely heightened anxiety (ex. Feeling totally overwhelmed in the airport) 

Is this typical on an SSRI? The Xanax has helped me calm down/relax but I'm obviously concerned to feel the way again in the days to follow.