Medication increase or change?

I’m 6 weeks postpartum and my check up appointment is coming up. My doctor prescribed me 10 mg lexapro the day after I gave birth to counteract postpartum depression because of my extreme depression/anxiety past. Although I do believe without this medication, things would be much worse, I still am having terrible thoughts. I get very down & I cry daily, I have racing thoughts, I can’t calm down easily, I sometimes think about hurting my baby and visualize her dying. I’m very scared to bring up these thoughts to my doctor because I don’t want my baby to be taken away or be admitted for psychiatric care. Can you guys give me your opinions if I should be completely honest or only tell her I’m having symptoms of depression still? Do you think I should ask for my medication to be changed or increased?