It's definitely not a good idea to just repress everything. It's sad that sometimes people can go many years without talking about difficult things. Sometimes people even hold things in until they die. I think the best thing you can do is a least start talking about grief. If you have a close person you can trust, they would be great to talk to. If you don't have anybody like that, then it's definitely a good option to talk to a profession psychiatrist. You many not even really need any advice. Having somebody listen to you and being able to voice your concerns and talk yourself through them can be enough. Another good help can be to write down what troubles you in a journal. If you are worried that somebody may find it, you could burn it afterwards. The process itself is what helps.