Possible miscarriage HELP

***update: I went in for labs yesterday. The Dr. called me today and said I was most likely having a miscarriage. He would know more for sure tomorrow (checking if numbers doubled). I have still been taking tests and every one of them have been positive. Even today. My progesterone was 3, hormones were 120.

So... AF was due December 16, she came and lasted a few days. Then on Wednesday, the 20th I decided to start tracking my ovulation early. The 20th, and 21, both showed I had an LH surge. So out of curiosity I took a pregnancy test on the 21, which was positive. I then took one every day after to make sure, and all were positive! Then yesterday, the 24th I started to have some spotting. It was only brown and only when I wiped when I went the restroom, nothing to wear a pad for. I had some light cramps, but nothing terrible. I am still spotting, but don’t have a need for a pad. I don’t have a dr appointment until Wednesday the 27th. Just curious what your thoughts are. I am 31, and already have two children.

**Update: I called and got to speak to my Dr. he said he would like for me to do blood work tomorrow and Friday to see if levels are going up. He said I could come in, but he thinks it would be a wasted trip just to see a sac, and I could wait until next week.