Hi SimK

Maybe you should see your prescribing Dr of the Effexor to ask his/her advice, however this type of medication should not be stopped, rather weaned quite slowly.
The risks as far as i could determine are unknown, which means that there is lacking evidence to suggest that it is a safe medication.

Maybe you could start some from of counselling (if you are not already doing it) and wean at the same time. Obviously your life situation has changed and you may be able to cope without the medication if you have the supports in place prior to weaning.

Do wean slowly though as i know that doing it too quickly can cause rebound depression and increase anxiety/depressive symptoms.

But as i said before - best bet - speak to prescriber and maybe it would be a good idea to consult an OB as well to discuss options

HTH and goodluck