Any time you have sex you risk getting pregnant. Those are symptoms of pregnancy, but I think its still too eairly to test. There a lots of factors that can affect periods, stress being a big one of them. I'd wait another week or two, then test if you don't start. If your not looking to get pregnant right now you need to use protection next time. Birthcontrol is great, but its also not 100%. I know because I was on birthcontrol and I'm 5 mnths pregnant. Use the birth control, use the condoms, and be safe. Take care!
When I got pregnant with my 1st child I felt exactly like you described. In fact had it not been for those symptoms I wouldn't have thought to check. I had no morning sickness whatsoever but I could sleep like I was hibernating for the winter & eat like I had a bottomless pit for a stomach. I can't remember how long after I missed my period I took the pregnancy test, but it couldn't have been more than 2 weeks after. Hope this helps.