early pregnancy signs?

Madison
About 6 days ago (I was ovulating that day) my husband and I had sex. Within 24 hours I had period like cramps. Within the last 6 days I have had off and on nausea until I eat then it goes away, cramps, lower back pain, and the weirdest thing is ... I've been a vegetarian for 2 years and I had the overwhelming urge to eat a burger. So I did and I did NOT get sick. It actually made me feel amazing! Could these be early pregnancy signs?? Any insight would be great as it's still too early for a test. My period is due in 9 days ....