Hi Summermummy.
No medication is recommended during pregnancy however your Doctor will have made the decision as to what is a greater risk, wether that it to the baby or to your state of mind if you stop them.
I was on anti depressants when ttc and when i told my doc i was ttc he told me to come off them as soon as possible, by halfing the dose every few days until i was off them. However sometimes people need to keep taking them. If you do decide to stay off them your body/mind will readjust pretty quickly. It is such a hard time though because you may not know if you are having mood swings etc because of no medication or because of normal pregnancy hormones.
Congratulations on your bfp and hope you have a happy & healthy 9 months whatever you decide to do. xxx