My LMp was July 23 . I m a PCO pt and have irregular periods. My home pregnancy test was very weak positive .I did blood hcg test which came as 113 only on 9.9.17 and on 11.9.17 it came as 210 and also scan done but no sac.but a week after I had light bleeding,went to hospital and in Ultra sound there was no sac both in uterus and also in tubes.my hcg on 18.9.17 was 875.my doctor told it s weak pregnancy .I m worried .what to do now.