Spotting in early pregnancy - any input appreciated!

I’m between 8-9 weeks and have had occasional spotting (light pink or brownish) for the past 4 weeks. I’ve let my doctor know, and they did bloodwork to check my levels.

My first draw, (at about 4-5 weeks) my hcg was at 49, and three days later it was 252.

I had more spotting a couple of weeks later and it was over 16,000. That was 2 weeks ago.

I’ve still had some spotting off and on since. It’s normally only when I wipe and doesn’t show up on a pantyliner. Never heavy and I’ve never had any cramping. I talked with my doctor about a week and a half ago, and she said not to worry unless it was bright red or if I was having cramping. She also suggested to take a stool softener, as I had been straining to go, and that could be a cause. I’ve taken it sporadically.

My first appointment is a week from today. I’m nervous because I just don’t know what to expect.

Has anyone had experience with this? It’s my second pregnancy and I never had anything like this the first time around.