With all due respect to you and your spouse
You shouldn't think ill of your wife just because she is not a virgin,u should realize neither were you.But,the fact that she hid it from you is not an honest thing to do for sure.If a woman can't trust you with her secrets she will be lying to you constantly only to keep her place secure.What I'm trying to say is that her not being virgin is not that much of a great issue than whether she is an honest woman or not.Look from a guy to another guy girls can tell you a hundred things like she loves you and sell you a lot of promises too but whether she means it or not I am certain that even they themselves are totally unsure of.
If she tells you now that she is sorry she hid it,its the only thing she hid,there is no guarantee that a few years later you wont find something else about her which she also hid,women are very good when it comes to things like these,especially if you have feelings for her she will always use it to her benefit.Yes they do that I'm sure you know that already.
Unfortunately there is not much you can do other than confront her and ask her to come clean with anything that u should know as a husband rightfully.I am sorry for what you are going through in your life only you know how helpless you are feeling but to be honest,having a good and happy marriage now a days is just like being successful in career or becoming really rich or something.
This is your marriage i.e at stake so you should do everything to make it right,but as a man to another at the end of the day ur wife is only but another woman,and girls have very tiny consciousness when they are ruining a relationship.
Try to work things out with her,u r a grown enough man to do that,but if, with time u still feel like this woman can deceive you in anyway I think u should consider some bold step then,coz like i said they will drag you till the end of the pit if they have to(thinking that she is doing any good) and when the sh** hits the fan she'll be the 1st one to abandon ship,so unfortunately and quite regretfully you Have to be selfish and look out for yourself,as it is only a rare few people who are blessed happy and merry love life and marriages and the rest of us will have to make though with wits and good foresightedness.
Good Luck to you and your wife I hope you two get on the same page soon.