I'd say my teen years.
I was diagnosed with ME at 15, left school with no GCSEs because I couldn't attend school (or indeed the private tutoring offered by the LHA enough to make much of a difference) I fell pregnant at a similar time, I went into my pregnancy thinking that I would need a lot of support because I was barely able to function a full day.
Anyway, DDs father buggered off, my mum chucked me out of her house because she didn't really want any of us when she wasn't receiving benefits for us kids. I was the eldest so wasn't really prepared and didn't know it was going to be like that.
At 17, I had no support system at all. One of my siblings went off the rails and kept disappearing, eventually it meant the police were turning up at my flat every couple of days to look for her as part of their search efforts because she had run away.
Then I found out that DDs father had been sexually abusing all of my siblings during our relationship, which he was arrested for, and the case dropped by CPS, I tried to protect DD from him, but the courts said I needed to allow contact between him and DD. In fact they were told by him that I'd concocted the story to get back at him...except my siblings told the police what had happened to them before I even knew.
I was cast out even further. But went to college to try and get some education.
I was groomed by a paedophile, though luckily I found out before he had chance to be around DD unsupervised.
Somehow, I just kept going.
By the time I was 20 I was in an abusive relationship and by 22 I'd pretty much had a full on break down, but for a good 4 or 5 years I just carried on carrying on. I seemed happy, I took the good in my stride with the bad, I never really spoke about my problems, I just did my best to get through them.
10 years on, I'm not nearly as resilient. I still don't talk about myself or my problems to people but I don't have the time for people complicating my life anymore. I'm careful to avoid stressors myself.