Do what you feel is right, your a mum and amazingly no matter how sick you get in pregnancy you'll be able to handle it! I spent the first 15 weeks with my head in the toilet bowl but still managed to keep the monkeys here under control, the house was clean and dinner was on the table every night! I've also managed to cope with 2 colds that have both lasted over 3 weeks and didn't bat an eyelid. Mind you hubby did the occasional vac or washing fold to help out while I was sick! The strength you have is an amazing talent and I'm sure you'd be fine to start trying!
Best of Luck!!!!
Snoopea