I too am so sorry to hear of the passing of your 8 year old relative.
Had she been ill or have any known medical conditions? Regarding the term suspicious, is that term being used by the police? And if so, what is their reasoning?
Regarding your planned trip, if I was in a situation such as yours, I would think in terms of how I feel and what I am reasoning to decide whether or not to go on my trip or post pone it. Instead of allowing the opinions of others or what others may think or perceive your situation to be, to decide for me. It is rather like a family who has every son enter the priest hood, but then there is one son, that unlike his other brothers stands up for themselves, and speaks out, to say what they think and how they feel on the subject, and in the end enter a completely different occupation (Just an example)
Whatever you may decide to do, please do so in peace and take care.