14 weeks post d&c hcg still not 0 and went back up this week

Jamie • Married to my best friend. Ectopic January 18. MC August 18. PMP October 18.Mom to two fur babies 🐱

So freaking out a little bit and so ready for this to be over with. I am 14 weeks post my first d&c and 6 weeks post 2nd d&c. Last week my hcg was 14 and this week they went to 16. Both d&c pathology came back normal with no signs of molar tissue. Has this happened to anyone? They did an ultrasound yesterday and no additional tissue was found and dr said everything looked normal. They are waiting til next week to see what my levels are to decide what they may do but he mentioned possibly methotrexate if they do not go down or go up again. If anyone has any similar situations and what was causing the increase.