Is there hope?

At 3w4d I got a pos in a hpt and bloodwork confirmed it with hcg at 10.3. Then at 3w5days I started spotting dark brown in the evening, mostly when I wiped but my hpts were darker than the day before. This continued with the intermittent spotting and cramping and at 4w I got my official HCG and progesterone drawn. Hcg was 85.6 and progesterone was 21.3. Doc said that looked good and the spotting was normal. Well today at 4w2d I went to the bathroom at work and when I wiped it was bright red. I freaked out and my dr ordered a redraw and it was 198.5 so they said they weren’t concerned and my levels were a little more than double and to keep and eye on if I had anymore bright red spotting. So throughout the day I haven’t had any bright red spotting, only dark brown but when I just went to the bathroom when I looked in the toilet I thought I saw little bits of dark brown tissue. Almost like hair thin on some of them. Is this normal?! I know there’s nothing I can do but I didn’t have any of this with my first 6 years ago! I feel like my levels are low even though they are within the normal range. Has anyone experienced this? Still no more bright red and only light cramping that I have felt this whole time.