Egg freezing


I am about to have my 3rd tumour removed in 12 months, following 4 LLETZ procedures. I am now being advised to have a Hysterectomy in the near future. Before I do, although children havent played a huge part in my life plan, I would like to have my eggs frozen, just in case (I’m 27). 

Has anybody been though this process and can tell me what it’s like? I did the silly thing of Googling it and read some fairly awful account.  This would be on the NHS not private. 

Many Thanks