Denil, I've been where you are now and can empathise with the constant nausea and anxiety. Don't try to eat a meal, stick to nutritious snacks like yoghurt and soup through the day, but do try to eat something.
By keeping the truth from you, your husband is making it more distressing for you. It seems to me that you need to stabilise the situation by taking charge a bit. Begin to make a plan. Assess your financial situation; look at your resources to see what your options are in terms of housing and finances. It may shock him into focusing on the issues.
When your marriage is falling apart it feels very scary and fears of an uncertain future are very real, but do you really want to hang onto this person who hurts and deceives you? Don’t allow fear to make your decisions. He was seeking happiness elsewhere and you are left reeling trying to understand what went so wrong.
For most of us, the key to survival at times like these is to step back, take a deep breath, and regain our composure. Then we can decide what course of action to take. Counselling helps, as a trained professional may help to put things into perspective. Your GP can refer you. Talking to objective family and friends can also help.
Although the process of realization takes a while, it begins to dawn on you that you don't have to go on living with the lies and deceit.
I think if we can accept that we did our best to honour our part of the marriage vows, we will eventually have closure. Without that, we are left to grieve, relive old memories to the point when you feel your head will explode and remain connected to this person who has betrayed you and the vows he made.
You truly deserve better. xx