Hcg rising but not doubling

Letty

Last Wednesday I found out I was pregnant (1 day before period was due) I went to the doctor to confirm but they said their was borderline they had me do blood work on Friday the 16th and that one came back at 107. I had to go back on Monday the 19th to get them checked again abd they only went up to 130. Has this ever happen to someone else and had a normal healthy pregnancy?