the one night I get to fall asleep for the entire night, instead of up every 3 hours, I am…

the one night I get to fall asleep for the entire night, instead of up every 3 hours, I am awoken(1:14am) by my arm that fell asleep underneath me. now cramping has set in and fear of my first ever ob appointment today im afraid of them taking my blood. last a doc did I passed out, im worried it will happen again. pregnancy has made me more sensitive to pain :( and it might be bringing out some anxiety too.