Hello! Yes, I have, and firstly a massive big unmumsnetty hug to you.
I first saw them in 2011 when I was pregnant with DD - I had hyperemesis, things were going really badly at work, I didn't feel happy to be pregnant even though it was planned and was starting to have suicidal ideation. My GP got me an appointment with IPPS - I can't remember who I saw at that time but she was really nice, although the conclusion was that I didn't really meet their criteria just then as my depression wasn't solely pregnancy-related.
When I gave birth to DD in May 2012 it was a very traumatic set of circumstances and I felt like I'd utterly failed and was a terrible mother to her - there was a point where I was trying to tell the midwives I shouldn't be allowed to take her home because there was no way we were bonding. DH managed to convince them to re-admit me, so I got seen by a consultant psychiatrist (Dr Bantick, if he's still around - he's lovely) and he got IPPS back and I saw Dan Graham who really turned everything around for me. I spent about 6 months seeing him and unpicking how I felt about the birth, my relationship with DD (which was fine; I just couldn't see it) and various family issues that had cropped up at the time (MIL was vile to me when DD was born via EMCS and really was the catalyst for the breakdown).
I cannot thank IPPS enough; I'm not entirely sure I'd be here to be pregnant again if it wasn't for them. DC2 is due in September and so far mental health is ok, though I do think I want to insist that I'm discharged by a psychiatrist and an obstetrician, just to be sure that I'm in good shape - I thought I was fine last time until I really, really was not.
Very best wishes for your appointment 