It's totally ok to be feeling upset that your T wasn't able to contact you in the manner you wished.

But SIing due to that anger isn't very fair to your T. By doing that, you're demonstrating to your T that you are holding your T to a standard that they cannot meet - their own life has to come first. It isn't fair to either of you to punish yourself because you didn't get the attention that you wanted at that moment.

Like... feeling the anger and upset and betrayal is absolutely acceptable - we can't really control how we feel. But we can control our actions and that is ultimately what we need to be responsible for. You could have written your T another email to let her know how hurt and upset you are feeling while she is attending to her family life, because that is acting in a way that will lead to a resolution and help.