What should I do--Need answers on the law?

Been working for a small company for a year, never taken vacation time or been absent. I have been a dedicated employee and my boss and his wife would take vacations and leave me to run the business. At the beginning of employment, they asked me if I was planning to have a family and replied "no" because they would discriminate against me. Well, anyway I discovered I was pregnant and never told them because I knew what the repercussions would be and I needed the money. After they found out I was pregnant they decided to Lay me off Via email and this was during my bereavement. I thought it was cold hearted of them to communicate via email whereas they could have talked to me face top face or written a formal letter. My boss told me I would have employment despite my pregnancy then changed his tune by saying business is "slow", which to me is just an excuse as they know it would be illegal to come out and say "we don't need you due to pregnancy" I'm healthy and still should be working as my baby is due in July. I am therefore getting a lawyer involved as I feel as misled , used and abused by these people. Do you think I have a case. I sent my boss a letter telling him exactly what I thought and he still hasn't replied. What should I do?