I had been on 10mg Citalopram for 9 months before getting preg- GP knew I was TTC when put me on and had also planned to raise the dosage but wasn't needed. I had just started to come off (gradually as people say - going down to alternate days then one in 3) as didn't feel the need any more, when found out I was preg. GP said I should stabilise the dose back at 10mg as it was potentially a stressful/ anxious time and benefit outweighed the risk. MW agreed. At about 4 months (I forget exactly) MW wanted me to see local hosp consultant clinic who does all the mental health/ etc issues in preg. they also said i shld stay on, and for post-birth period too, as stability again outweighs any (tiny risk of) potential probs. They are all still v happy with this, so I did what they said.
The only slight regret I have is that (at 38 wks today) it is making it a little tricky to finalise where I am having the baby! MW is frustrated that local guidelines (so may not be the same where you live OP) cover the (very small) dose of 10mg the same as any similar medication in preg (which as others posters have said can be way higher). this means the protocol suggests 24 hours obs of baby. in theory I would be very happy with this as is 1st birth and I want all the help I can get! but, annoyingly, local MW centre was put on reduced hours last month and is now day time plus on-call, with no overnighyt stays after birth, with the result that in theory they may want to send me to the local hosp 30 mins away where my partner can't stay in. MW's best advice so far is that i can just discharge myself, which makes me a little nervous!
so yeah, i think what I am saying is, from my experience everyone has been very happy about me staying on, but if i'd known it wld have an impact on birth choices (which everyone told me it wldnt, grr!!) i might have asked again about possible tapering off of dosage.
hope you get sorted - it doesn't seem a massive issue either way, so don't worry!