I’m really sympathetic OP, and understand as a mum in a very similar situation, although my child is older now.
For what it’s worth, I don’t think the ‘buying a baby’ comments were about adoption, I think they were about surrogacy. People have strong feelings about it, I happen to agree with those feelings, but not going to repeat anything already said as you’ve done more research into it now.
Sorry to say, I’m not sure this was very sensible advice from your therapist. Unfortunately, sometimes the size family we can have is simply beyond our control, it was for me. Clinging to that dream or taking a ‘whatever it takes’ strategy isn’t going to be healthy for you, because sometimes there is just nothing you can do and could push you into making decisions that aren’t actually the right thing for your family.
That’s not to say that I don’t think you should adopt- more informed posters than me can provide better advice. You sound like you are in a lot of pain, and I wonder if this is something you really need to make a decision about right now. Sometimes, it can help to take a break from struggling against it and think, just for now, I’m going to focus on healing and enjoying the family I have. I’ll revisit this in a year/a few years/ whenever feels right for you.
In my case, I decided that my own trauma meant I wouldn’t be able to give a child with a traumatic background what they needed, because I wasn’t healed myself. So I parked the decision, thinking that I’d revisit now and then to see if anything had changed, and if it had, I could change course. I made a conscious effort to notice the benefits of having an only child- they didn’t always feel like they outweighed the sadness of not having more, but trying to notice when things actually feel ok can be helpful for making peace with it. I found that as my child got older, the perks of having an only became more apparent.
Several years on, and I’ve accepted it and feel happy with just one. I didn’t even notice it happening, it felt better in small increments. I’ll always feel a pang at not being able to have more children, but it’s not raw, and truly appreciate the upsides of having an only child. Also, I’ve made huge progress with my mental health and processing my trauma. It’s just my advice, and it may not be right for you, but I found I wasn’t able to reach acceptance until I got out of the ‘I must do something about this right now’ mindset and started thinking ‘these are big decisions and there’s no need to pressure myself.’
For you, it might be totally different, and you might come to the conclusion that adoption is the right path for you and feel totally confident moving forward with that decision. Whatever you decide, I wish you happiness and peace.