I thought I'd come at this from a different angle but as someone who has felt exactly the same as you and has come out the other end. Sorry this may be long...
We too bought our 'dream family home', one we found when I was finally pg after ttc for 18 months. By the time we moved in I had had a mmc at 13 weeks. I had a second early mc after we had been in our new house for a year. We arrived at the decision to have ICSI a lot sooner than we expected as my fsh levels were rising. I think this is a decision that only you can decide upon. I have had friends who have decided against it but also known other people who have had between 5- 10 cycles and their lives became dominated by it. Personally, I can't link the link between choosing to have fertility treatment and the mmr jab but that's just me. I don't actually think it's an indication of how much you want a child as such, it's more complex than that.
I've posted before about knowing 'when to stop' fertility treatment. I knew I didn't want to be one of those people whose life was completely consumed by ivf/icsi cycles. As it happened, I had an early mc with our first cycle and complete non-fertilization of our eggs on cycle 2, which is practically unheard of with icsi. There were no obvious problems and we were told we could have a third cycle but it would be a very much 'guinea pig' type of run for them to see what the issue was with very likely the same result. At that moment, I knew we should stop.
Our lovely family home still had empty rooms and had turned into a sad place where lots of tears were cried. I had stayed in the same job as they had been very good with me having time off for treatment and I really wanted to go back to work there after I'd had a child. The longer this was going on, I just felt trapped there as I knew any other jobs I went for my headteacher would need to mention my time off.
BUT I had a very firm belief that if we never had children, and as you know you can't 'make' them happen no matter how hard you try or want it, that dh and I would still be ok. It wouldn't be the life that we'd hoped or the life I'd pictured in my head (we've been together now 21 years since late teens so had had a long long time just the two of us) but we would be ok. Our grand plan was to both give up our jobs and travel the world for a year together to get a bit of brain space and regroup.
However, in the end we decided to go down the adoption route. I'd like to refer to a point made earlier. Of course, in an ideal world, everyone wants a healthy baby but that's not always a reality even when you give birth. All I wanted was for us to be a family but of course, we wanted the child to be as young as possible. Initially we looked into inter-country adoption and even then when they are talking 'baby' you are still looking usually at 6/7 months plus. We ended up adopting in the UK and were incredibly lucky to adopt an eight month baby boy who has now been home two years and is the light of our lives.
Sorry I've started to ramble. You haven't been ttc that long even though I know it feels like it and I'm sure you will get your baby. But if that doesn't happen, you will still be alright. You will still be able to have a happy life with or without children. My life is now unrecognisable to that of two years ago. I went from working very hard as a teacher, gave up work on the Thursday, we met our ds on the Monday and he was home with us the following week. Eight months later we moved to the US and I'm a SAHM to ds. Obviously we don't have the comparison, but we cannot even imagine how we could love our ds more if he was a birth child.
Ramble over 