My son died very suddenly over 15 years ago.
We were eating cupcakes and watching the sunset before he went to bed. He never woke up.
I found a lot of support from child bereavement UK but I guess it depends who is on the forum at the time. But I agree with what a pp said, be careful what you post online and who you trust, sadly I have experience the dark side of this.
I'm a lot further on than the posters here, it doesn't get easier but it does change, best explanation I've seen is it is like ripples when you drop a stone in a still pond. To begin with the ripples are deep and close together but as the years pass they are less pronounced and have a longer distance between them- but the pond is changed for ever, it isn't still again.
I also sign cards from all of us, but like @Downtoyou I draw a sunshine with his initials in the middle, his grave has a sun on it, he was sunshine.
I didn't take medication, but my husband did. I don't think there is a right or wrong way, but for me I didn't feel that how I felt was wrong, I didn't think I was depressed I felt my feelings were completely reasonable. I do recommend counselling, it helped with the flashbacks.
Just take whatever support you need, take the advice and help that works for you and ignore anything that doesn't. Do what gets you through, there is no right or wrong.