My therapist mentioned this symptom

My therapist today asked me if I am irritable and mentioned it is a sign of PPD. In the evenings I am very irritable. If my husband has our son and he is crying I get very angry. I feel I am almost OCD with our bedtime routine because I am so anxious about not sleeping. If something doesn't go right at bedtime I have to start it over. Unswaddle, change diaper, reswaddle, rock. Maybe I should have mentioned these things to my therapist, but I didn't really notice the extent until tonight.