Stomach Flu And Vertigo Can Bereavement, Especially Unresolved Grief Cause Illness?

Can bereavement, especially unresolved grief cause illness? - stomach flu and vertigo

As my aunt, who died as a mother to me after Christmas, I had flu symptoms. Fatigue, abdominal pain, nausea, headache, pain, sore throat, cough hanging, even taken aback a little.
I went to the doctor several times, took blood, hopefully, finally, no doubt, is not a virus six months. Come on!
Anyone who has ever felt that way than through the losses?
More than 18 years, please serious answers.
No abusive behavior.
Thanks