It certainly isn't a small thing! If my husband got ill and nearly died I would be extremely traumatised! I know what you mean though by you feeling it is minor and you don't know why it's still effecting you as I feel the same way about my some of my traumas.
I'm starting prolonged exposure and today just mentioning a trauma that happened 18 years ago made me burst into tears and say to my therapist 'I'm stupid, other people have been through worse' The thing is how it effects us is due to a lot of things and you have already mentioned your lack of a support system at that time.
So don't judge your reactions they are what they are and the main thing is that you are trying to deal with them. Please practise as much self soothing and compassion as you can during this process. Love and comfort yourself as you would a fragile child, parent yourself. This will help you cope with the painful emotions.
Good luck x


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