I don't know about communication from beyond the grave, it all depends on how you see the world and life and death. The concept of communication to those we have parted ways from us to me seems unhealthy.
Death is a hard thing for people to deal with, everyone suffers it and EVERYONE needs to cope with grief and each person has their own way of dealing with it. I've suffered depression for my entire life, till the point where I was forced to get help. I had seen counsellors before, they didn't do much for me, we'd talked about some issues and none of it had helped.
I met my state appointed counsellor who I bulls***ed around, I talked about nothing as usual but made it seem like we were making progress. The next day when she came in and saw me, she told me that she knew what I was doing and she wasn't going to let me do it. After that I opened up, slowly albeit, I spent a whole year seeing her before I got to the point that I started feeling better about myself.
Funnily enough the things that got me down most were the little things, the stupid things that I thought didn't matter, the ones I felt stupid talking about. She told me that it was common to feel that way about those things, that so many people came and saw her and felt like that.
I know you don't like the idea of counselling, I know it seems scary and stupid. They help though, go in on your terms though, don't walk in there worrying about what the counsellor will think, don't feel uncomfortable. Search around for all the counsellors in your area, visit the counsellors sit down and have a chat with them, try to find the younger ones, don't go with some stuffed shirt who is like 100 years old, don't find the ones that will tell you what you expect to hear. Find one who is young! They're always the best, they've gone through what you've gone through. Trust me nothing you can say to a counsellor will surprise them. I once told my counsellor one of my deepest darkest secrets that I didn't think I could ever tell anyone. She had a shocked look on her face and I thought I was right, she turned around and started laughing, I'd spent so much of my life freaking out and worrying because I thought I was different when it turned out everyone experienced the same things as me and she heard it heaps.
If you don't feel comfortable with that still, call a hotline, trust me they hear so many things that nothing will surprise them any more, there is nothing you can do or say anything and trust me they won't think you're weird or stupid. They're trained to help you, to talk to you about these things.
Please I implore you to go and seek some form of counselling, whether it's in person, hotlines or just talking to someone on the forums. Don't turn to the occult, many of these people live off other's grief, giving them false hope and fake truths. I'm not denying that there is an afterlife, I just don't know, I really don't know, what I do know is that there are many people out there who will happily lie to you about your loss to get your money.
It helps to let it out, we all would do anything to help you, all of us would be happy to talk to you about this, myself included, I have a lot of experience dealing with it and I'll happily help talk to you about anything, I won't judge you or laugh or think you're stupid!