Symptons as post FET?

My 2ww is over and my beta is 6996.  first hcg test was 16 days later instead of 14 days.  I am pregnant but i dont reallt have symptons. i didnt think the ivf worked because i felt like i was about to start my period. same symptons as my period to my surprise i am pregnant. other than sharp pain in my back that lasted 2-3 minutes. i have no symptons. this is makimg me a bit nervous. i go for beta test 2 on Monday. Is this normal?  anyone have a high betta after 2ww?