After losing your DH to a traumatic event like that, no wonder you feel so lost and bereft.
Going ahead with the party was exactly what you should have done, and many others of us would also have done so in the circumstances.
Ignore the nay-sayers, they seem to gather round the bereaved like Job's comforters. A friend, recently bereaved told me some of the crass remarks made to her after her husbands premature death. They were appalling.
Remember that there were aspects of your tragedy that you can be grateful for. You were with your DH when he died so suddenly; you were able to give him every chance of survival by being able to give him CPR - and were successful for a short time. He will know how much you did to save his life and love is shown as much by actions as in words.
Do not worry about how you feel, so seek help through Cruse or otherwise, if you think that will help. Take your time and eventually you will see the dawn again and a new day will come.
Fruit flies - help needed please.
Army horses loose on London streets
Have any of you got all electric cars? Pros and cons please.