So discouraged...

So I've been making progress slowly but surely for a bit now, only to find out a month or so ago that I'm pregnant. I told myself that healthy baby comes first, but with morning sickness and falling back on comfort foods, I now find myself back at the weight I started at last year. It honestly surprised me how much it hurt to be this big again. The weight does not come from baby, but it's so hard to find healthy things to eat I don't just throw up. I have IBS really badly, and an allergy to all kinds of tree nuts too, so all the magazines show people chowing down on helpful snack ideas I mostly cannot have. I guess I'm looking for recipes or easy things to cook, tasty is a bonus, any experience is helpful too... thanks