Cycles after miscarriage


I had called my doctor because I am on my second cycle since miscarrying and it just doesn’t seem right. I have horrible cramps, followed by brown spotting for a day or two and then really dark red blood for a couple days and then spotting pink and brown for a few more days after that. I still start my period on time but it makes me feel like my lining isn’t shedding properly or that I won’t be ovulating on time. Does the brown spotting effect ttc? My doctor said this could just be my new normal and didn’t seem concerned at all 😥