Here is some info for you:
1) Upping the dosage of the medication:
It (Does Not) take the same amount of time to kick in as when you first started taking it. Paxil is much like prozac in the area of reaction time.
Basicly how it works is, once you begin taking the med, it builds in your body, it "Can" take anywhere from 2-6 weeks for you to actually feel something once taking the med. As you have seen, its not a BAM! Hello! Here I am! type of med. Slowly you start feeling better, and each day have more pep in your step.
Now, upping the dosage, it does take some time for the higher dose to take more of an effect in your body, but it is in the range of 1-2 weeks.
The symptoms your are having may be cause by a "Drug overdose" which is not like overdosing on a narcotic.
It may be actually "shocking" your system as it kicks in. I would personally wait another week, and see how you feel. If the symptoms do not change, consult your doctor and let him/her know. They may want to even UP your dosage, this is when I would seek another doctor, someone that is familier with the disorder, and VERY familier with the meds.
Too many doctors today want to push drugs on you. And when you tell them "they are not working like I would like." they try to UP the dosage on you. I like to call these doctors "Drug Pushers". A little knowledge I have gained from my ventures, is..
There is NO cure all drug! I know this just hits you in the gutt, and you think "I am doomed forever!" But you arent! :)
What alot of people need to realize is that meds are o.k. BUT, you still need to take other steps to help control your anxiety/depression. I have found that meditation, or even yoga, can help your mind very very well.
I hope this helps :)
God Bless.
-MrCrazyCool