I'm pregnant for the second time. (Supposedly) im 5 weeks and 1 day. I been cramping bad. They did blood work for hcg on Wednesday and it was at 500 and they did it today Friday and it was 700 the dontors did sonogram and they didn't find a sac or anything. Is this normal? Has this ever happened to anyone else. In suppose to go to the doctors on moday to check hcg again. Is it normal not to see a sac at 5 weeks??? Someone please answer me???