Postpartum depression

I’m 6 months postpartum and I think I might be experiencing postpartum depression. Ive struggled with depression for years and gave been on an SSRI since high school, but I’m feeling a lot of the same ways I do when I’m off my meds. I’m wondering if this is postpartum depression then and I need to get my dose increased for a while or what can be done? Has anyone had any experience with postpart in depression while already having depression?