Hi Happystars i am so so sorry for your loss.
I am the same. Suffered a missed miscarriage in February and, like you, after the initial couple of weeks I was ok for a while. But I found trying again was a big factor in making me feel 'ok' and positive.
Since DP has told me he doesn't want to try any more (after an early MC in April) I have been battling with terrible grief. Like you, triggers are everywhere. I've become bitter and resentful towards pregnant women, I don't know who I am anymore and really dislike myself. I've upset my SIL as I just cannot be around her just yet (she is pregnant) and pretty sure the resy of DP's family think I'm a cow.
I went to see a psychiatric nurse last week who told me she does not think I'm depressed (despite me admitting to her I have had suicidal thoughts). She says I'm grieving. She said I have four factors exacerbating my pain. Two lots of pregnancy hormones pretty close together, my PCOS, and my thyroid issues. All of which, she thinks, are playing havoc with my emotions. I am going to get my bloods checked and current meds reviewed. I am hoping that will help. I am also going to keep seeing the nurse so she can help me to avoid becoming depressed. I'm still not convinced I am not, however.
I also had counselling for the first few weeks after our loss (through work medical insurance), but I found the sessions awkward and, at that time, I was ok as we were TTC again. I wish I'd saved those sessions for now.
I would recommend going to see your GP. They might put you in touch with the Primary Mental Health care team like they have done for me. I'm a long way off but I hope the nurse can help me through it. I just need to work out how to get back to who I was before we discovered we were expecting our little girl. Back then, more DC hadn't even entered my mind. Right now it is all I can think about. It's like I need a baby or I'm going to lose the plot entirely. I can almost feel them in my arms but they are empty
Not helped by 'support' groups banging on about trying again and having 'rainbow babies'!
Go and see what your GP says. I would recommend seeing a female GP though. First GP I saw was a man and I had the worst experience. I left his office in floods of tears. 