Weight restriction during pregnancy: how serious should I take it?

I was pregnant last year and I lost it. :( I lost it due to a chromosome defect that the doctors don't think should happen again. So my husband and I are trying again. When I got pregnant last year, they put me on a 20 lb. weight restriction. I was unable to do my normal job at work and I felt like everyone had to wait on me. I hated it. My body is used to the lifting that I do at work and I didn't think it would hurt to continue, but I did what the doc said. Now we're trying again and when we get pregnant we don't want to tell everyone right away this time for fear that I'll have to go through the heartache again of having to tell everyone that I lost it. But if I'm on weight restriction, everyone is going to know. Do you think it would hurt to not tell anyone and continue with my normal job? The max amount of weight I have to lift is 35 lbs, but I may have to lift that much up to 25 times a day. I also work out and lift more than that during weight training. What to do?