Aloha !

Yes Tash is right, Voodoo is black magic and therefor dangerous. Being under the curse of something is possible and my advice is that you seek for help if this continues any longer since it's not exactly a nice way to live. Since you were one of the last persons he contacted before his death it could be that you've taken some of his bad energy and therefor a bit of his curse too.

Maybe you should go and write down your dreams each time you wake up, even if it's in the middle of the night, just to check if there's some kind of pattern in them. That might help you find the answer to your dreams and maybe to his death too.

A psychiatrist will take you serious since it's a big step to go to one, and therefor he'll take you serious. Such people know a lot of things about anything, it's not just about finding yourself back etcetera, but there's a good possibility he or she will know how to solve your problem as well.

Salaam Aleikum,
Sebastiaan