Hcg levels rising irregularity

Natasha

Im 7 weeks 1 day and was in ER a little over a week ago for bleeding. I had a transvaginal ultrasound and measured 4+4. My hcg was 975 so they sent me to do hcg levels. Monday i seen Dr. My levels were 2168 and 2689. Dr.said that is abnormal and sent me for another round of 2 tests. Today she said my first test more than doubled but my second didnt so im going for another ultrasound since no fetal pole was seen in first. Has anyone had this kind of issue resulted in a viable pregnancy?? Im soo worried.