morning sickness usually starts around 6 weeks into the pregnancy, so your feeling sick must just be due to anxiousness, a placebo effect, or something else. as for what
>>2 said– Idk if that's true, but I've also heard that 2 weeks after a missed period may be a sign that you're pregnant (assuming your periods are regular to begin with).
I don't know how to ease your mind because there's really no way of knowing until enough time has passed. I'll say this, though– sometimes it's harder than people think to get pregnant. I know couples that have tried for 4 years to have a child before it happened.
wait until you've missed a period (3 weeks after sex if your periods are irregular), then get your hands on a pregnancy test. if you can't afford one or access one for other reasons, look for a Planned Parenthood in your area– they provide free pregnancy tests. if there isn't one nearby, try other local health centers. (just be careful though, Planned Parenthood has reported that there are "crisis pregnancy centers" out there that are scams. https://plannedparenthood.tumblr.com/post/66243936604/how-can-i-tell-crisis-pregnancy-centers-and-real)
>>3 grilling OP with all those questions is so unecessary. she's already anxious about it, probably because she already knows the consequences of a pregnancy.