Nausea and vomiting

This is baby #4 for me. All 3 pregnancies before I ended up with Hypermisis and from 7weeks to 13-15 weeks I couldn't keep anything down and basically laid down and threw up constantly, lost 20-25 pounds. I was so hopeful I wasn't going to get it this time around, I'm 7wks 5days, but no luck. It hit this morning, after 2 full days of a bad cold. I have a kindergarten performance for my oldest and a birthday party this weekend that will be very interesting-i guess everyone will know I'm pregnant by next week.