is mirtazapine/ remeron withdrawal DELAYED?

Hello!   So I was started on mirtazapine 30mg during March 2020.  This was also the time I found out I was pregnant.   The meds kept my racing thoughts, severe anxiety (and BDD) also insomnia under control.   The plan was just to continue after the birth - and psychiatrist didnt want to make any changes during the post natal period.
However I was not able to cope with a baby overnight with any level of sedation in my system.  So 3 weeks after birth I cold Turkey- I was immediately able to cope with baby (without telling psychiatrist)But the withdrawal symptoms have been fairly minimal.  So far dizzy , reduced appetite and slightly upset tummy.  But overall crazy anxiety etc not returned.   I have read a few places the withdrawal can start many weeks after stopping??  Or is it that I have a high tolerance ?   Just worried if they are gonna hit me with a bang and need to plan for it.
Thank you!

I hope you have good times with your child when it arrives on the scene.