How do you deal with bloodiness?

[NeonPegasus]

For the past 12 months the urge to have another child has been completely overwhelming for me, and it's tearing me apart.

We have four children. A year after our youngest was born, DH had a vasectomy because we both said we were done. She's five now and I really regret making that decision. I've suppressed it and tried to forget about it, I can't. The want for another child is all encompassing, it bothers me all the time, I've spent hours laying awake at night upsetting myself over the fact I won't ever be able to have another.

Has anyone dealt with this and got through it without driving themselves completely insane? Because I know I'm being irrational, I have four beautiful and healthy children, I should be content with that; yet my brain keeps insisting otherwise.

Someone knock some sense into me, please!

[Heratnumber7]

Would volunteering or working with children or babies help do you think? Or would that make it worse?