Hi Emma,
Great to see you still standing strong. (I'm sure you'll understand what I mean) You have a lot of resilience to call on.
Yes, grief is an unpredictable emotion. If you are aware of the 7 stages of grief it helps knowing where people are in that cycle, and knowing full well they can slip and slide all over it until they process what they need to process.
Parents being what they are; parents, often lock themselves into that attitude, I/we can work though this matter ourselves. We don't need outside help (Perhaps due to the shame/fear factor), so don't be surprised they don't take up your offer of assistance.
The point they really need to come to terms with ASAP is that it's not their fault. It is a well documented MEDICAL condition, as a result of many factors not limited to genetics, hormones, environment etc.
I'm pleased you feel relieved your worse case scenario didn't eventuate. That in a way can be so liberating too. I was pleasantly reminded by my therapist recently of the 'cataclysmic' attitude I presented him with, when I first started. That too didn't eventuate. I have since stopped 'crystal balling' everyones reactions. Nerve racking though.
Hang in there and over the next few weeks/months I'm sure you'll see a vast improvement. You are over the worst of it now. Just like dropping a rock into a pond. Big splash and much disturbance at first, then comes the ripples, which eventually fade away.
Look after yourself and be safe, well and happy.
Lotsa huggs
Catherine