No, it really is not!
I only comment now because I think that your keeping on telling yourself over and over that this pain after separation is the most unbearable agony anyone can suffer is actually making you feel ten times worse, and preventing you from moving on from the day of the split.
Try to stop quantifying, or measuring this awfulness, day to day, and just acknowledge its presence; then sort of avert your eyes from it, as it were.
Sure, it’s still there, but you really do not have to be assessing it every five minutes!
That gives it power over you, and makes it appear much stronger.
Let it be, and just get on with the necessities of family life (you've your dad and your son with you, so there must be demands on your time) and be like a woman with broken ribs or a fractured arm: part of you really hurts a lot but you can’t just sign out of life because of it. You KNOW time knits our fractures back together. So let it.
Im convinced that the best way to get through the pain you have right now is to go through it; let it do its thing but with no help from you (ie, no constant checking, describing, querying etc) and just grit your teeth and fight your way forward, as though it were a dark tunnel-type shape between you and where you want to be.
Accept its sudden flashes and other hurts, that’s just its way, and par for the course, but every day is draining away a bit of its original power.
If you leave it alone, and you determine to keep on keeping on, right through it, you will be out the other side of it sooner.