Freaking Out! Waiting is sooo hard...

AF was to start today, nothing. I have been on BC, but I got pregnant and mc in April. I started on BC again, and according to my pill I should have started my period this morning. I have been beyond exhausted and nautious for a few days, and I'm not interested in food at all. I'm freaking out because I would be elated if I were pregnant again (so would my finacee) family wouldn't be so happy. But I'm scared to know, because I'm worried about something going wrong again. How long should I wait to test. I was 5 weeks when I found out I was pregnant last time, and my Dr. said most people don't know that early. I'm so on the fence about weather I start testing until I get my period or get a positive, or wait till the end of Aug when I would be 9 weeks and would start ultrasounds and prenatal care. (I don't drink or smoke and am already on a maternity vitamin from my last pregnancy, so all safe there :) ) any suggestions on what I should do?? What would you do? ?