A research study found that spouses of suicide or accidental death victims who did not communicate about the death with their friends were more likely to have health problems such as weight change and headaches than those who did talk with friends (Greene, Derlega, & Mathews, 2006).
This cannot be healthy at all to hold stuff in, especially if you lost someone. Please make sure you find someone to talk to, whether it be a therapist, a friend, grief counseling, or even write in a journal. Holding all the pent up emotions during a stressful time can do harm on your body and mind, I love self help books and they have a book for everything. That can always be another option, but please just let your emotions out and communicate with someone