Irishmammybread, I'm so so sorry you are going through this, it is exactly what happened to me. I too had those scans around 7/8 weeks,had a healthy heartbeat,then started spotting at around 10 weeks. I also didn't tell my children about the the pregnancy because of what we'd been through with the previous pregnancy. But once I realised I had lost the baby, I had to tell them,because there was no way to keep my sadness under wraps.I just couldn't and they needed to know why I was grieving. They seemed to cope much better the second time, perhaps because they hadn't built up any excitement about a baby coming.I don't know. They were just so loving and supportive of me when I went through the grief.At the time my DD1 was 14,DD2 was 11 and DS3 was 3 (my older boys knew about the pregnancy).
I also had an ERPC, because I couldn't handle the thought of carrying my little one anymore,once I knew he was gone. It is a natural reaction I think.I also couldn't stand the thought of a miscarriage dragging on for a long time, or having to deal with labour pain. I don't know if I would do so again,because after the second ERPC, I didn't have any bleeding (at AF time, I was charting and knew I was ovulating, but at AF time I had pain,cramping and no blood)for several months, which really worried me, and it was thought I may have had some scarring from having two consecutive ERPC is 6 months. Thankfully the problem seemed to resolve itself, but I think it did stop ttc for that time.
I asked for the tissue (after the ERPC)to be examined to determine the cause of the miscarriage, at the time,I really needed to know why. Unfortunately the test results were inconclusive, but it did help to know I might get answers.
As for it being your last chance, there really isn't anyone who can decide that but you. I know your DH and DS both care deeply for you and cannot bear to see you so devastated, and that is why they wouldn't want you to ttc again, but there is nothing like that longing for your baby,particularly when you have experienced this kind of loss, and you have to come to the decision yourself.
It was just over a year ago that I had my second miscarriage,and like you I just couldn't bear to think of my future without getting pregnant again. It has taken time, and I do feel better about it all now, but your journey is your own,and that need to try again is part of it. I do hope your DH can try to understand.
I'm so sorry for your loss.If I can help in any way, please PM me.