I've been on mumsnet for years now and often can be seen frequenting the 40+ ttc threads and now more recently the one child families thread.
A second never happened and with the big 50 looming I am going through hell beating myself up after not being able to provide a sibling for DS. We did try for another on and off for 4 years but having DS at 41 meant I felt exhausted and like I couldn't cope with another as well as him. Now I hate myself for not trying harder to conceive. It's too late and I wake up every night fretting and crying. Peri symptoms keep me awake and then this endless worry going around and around in my head.
Can anyone please help me to come to terms with this and reassure me that siblings are not the be all and end all!! ...I'm so depressed and feel so bloody guilty 
Thank you xx