I'm on the lowest dose now, though, and really experience zero side effects. I still experience physical anxiety, but it's very much manageable - and I prefer that as opposed to being completely numb. It's tempting to increase the dose, but I've been there and it's only necessary if you're in an acute state of anxiety and your body just needs relief. As for mental anxiety, that's decreased since being on medication quite a bit, but it's still there somewhat.
How much is your low dose ? I've just increased to 10mg from 5mg as nothing positive was happening so far, and boy.. It has raised my anxiety and physical tension so much i've been paralysed and haven't been able to do anything for the last two days.. Maybe I should have stayed with 5mg and waited some more.
What brand name are you using? I'm on cipralex, and the lowest prescribable dose is 10 mg. I'm not sure why you're experiencing anxiety from upping your dosage, as the medication is supposed to reduce anxiety! Could this mean you're a non-responder? I think you should talk to your doc about that. It must be frustrating.