Hi Starkfull,
Since I am not a doctor, medical professional or grief counselor, I really don't have an answer to your question. I "think" I read somewhere that the various stages of grief are rather elastic and that there is no set time limit to them. But I could be wrong about this so please do not rely on my words.
Do you think it might be helpful to consult a professional for advice? Your health is very, very important and you deserve the best possible advice you could get.
On a personal note, I once experienced a period of intense grief that lasted 13 years and I wish I had sought professional help. Luckily I finally emerged from it whether from luck, the healing power of time or some other causes.
I wish you all the best and I hope you get a lot of responses to your post from people with more knowledge and insight than I have!