Please don't let your wife pressure you into this. The risk of regretting it is simply too much.
Ask her one question...how would she feel, now today, if she was told you can't have sex again. How would she cope being celibate?
The answer she gives, if honest, will hopefully make her sit up and reevaluate her thought processes.
I regret this every day, the pain hurts me everyday, not being able to make love cripples me every day, the stress of losing my job is so heavy, the inability to have a social life hurts badly.
I blamed my wife horribly initially and was so resentful of her but over time I realised it wasn't her fault...All she asked me to do was consider options. No pressure at all, but the pressure was there in a way seeing her struggle with pill and in pain with coil. I couldn't let her go on like that so I decided to go for vasectomy based on being told there was no long term risk to my health.
My wife I love so much, she has been supportive and loving and understanding. Many are not so lucky and their wives leave because they can't handle the partners pain or can't handle the lack of sex.
My loathing and bitterness towards the medical profession is endless however.
After 3.5 years life is total hell.
If your wife asked you to put your hand in a fire would you do it? Probably not, so don't let her force you into this.
I might be totally wrong but if she's like this now how do you think she'll be after it all goes wrong? Lack of understanding and support now can only lead to huge issues when it goes wrong?
Whatever you decide best of luck but it has to be what YOU decide is best for you, your health and future life