I can very much understand your wish to get something to take the edge off anxiety.
I have tried CBD - C8D Patches - NEW Advanced Formula 12mg 30PKC8D Patches - NEW Advanced Formula 12mg 30PK from Tower Health
https://www.tower-health.co.uk.
I only tried them at night, they did help me to get some sleep BUT I did have some very vivid dreams. I don't use them any longer however we are all different you may be fine on them.
If you were to try CBD it might be as well to try it well before the funeral to see how they suit you.
Having seen the other replies to your post, of course I am sorry to hear of your loss.
I hope you both get through this in as peaceful/non fraught manner as possible