Hello Alan, I can only echo the thoughtful posts by Hubby and Julie, all on here have gone through what you are feeling, and there is nothing worse. It does get easier with time, but it happens very slowly, it's 5mths since I lost my own wife to whom I'd been married for almost 49yrs. I miss her every single day, and rarely does an hour pass when I don't think about her, but somehow we have to exist and manage the best we can.
5 days is very early and it's raw for you, I remember my 1st week after my wife passed away very suddenly, I felt absolutely awful, I was sleep deprived too as I'd stayed with her all 4 nights and so had not slept, my mind was all over the place, and indeed we find it hard to grasp what's happened. I know in my case it took a few days for it to sink in, I still wake up some mornings now thinking it was just a nightmare, people don't realise how we feel, because they simply have not gone through it themselves, and unless one has, they truly do not have any idea.
When you have loved someone for so long and they were your life, it's something I don't think we ever get over, but yes with time it can become a little more bearable. In the early days, it was rare to go a day without me crying hysterically because I miss my wife so much, and I still do quite often, they say that's a release valve for us...I don't know, but I am going longer periods between crying sessions.
There were times when I felt really low, and wondered whether I want to continue, but there are family members to consider and so I keep taking it a day at a time...a phrase used often on here, because that's all we can do.
Rest assured Alan we do know what you are feeling, and I hope in some small way posting on here may help you, sometimes sharing and talking about it can help, it's what makes this forum so unique, you are among friends here who are experiencing the same as you.
You take care my friend