Super long period ?? Opinions ?

Back story:

I am on cd 9 and still bleeding. I’ve been actively ttc since May 2018. My normal periods are 4-5 days. I have NEVER had this long of a period ever in the 10 years I’ve been getting a period. I do have an apt for my yearly scheduled for Friday and I did notify my doctor today about this situation. The first thing they asked is if I had taken a test I said yes it’s negative. Just trying to figure out what is going on.

How many of you have had a period while pregnant ? If you have what was it like ?

And/or

How many of you have had a 9 day period and what was the cause (if you know why)?