So sorry about the loss of your young daughter. This journey we are all on is just horrible. I think I would have been advising you not to go to the service, we are just too vunerable at these meetings. I didn't go to any funeral services for over 3 years. If the people were close, I would call and offer food preparation, or even staying at their home during the services but I never went to one.
It is very unforunate that you had an accident on the way home and a serious one too. What happened is your mind is totally distracted by your emotions. You are not crazy but you are not the same. I hopeyou are recovering now, try and be kind to yourself, rest, don't push yourself to make others happy. You are still in the healing process. None of us will ever be the same so we have to learn to live in this new life we were dealth.