I want to donate my eggs!

I want to donate my eggs as I had trouble conceiving myself & I always said if I ever had my much wanted baby I would donate my eggs. I would like to help any other women who want to mummy's but can't conceive naturally. I live in the uk and I'm a 30 year old who doesn't smoke & is otherwise healthy. The problem is I'm scared & unsure of the process and if it would affect my future fertility? I'm not sure if I want anymore children but I may do in the future. I think I'm mostly wondering if I would need to take a lot of time off of work and would it be painful as I've got a 3 year old to look after. Has anyone else done this and what does it involve?