I'm in a similar situation although I'm not as far down the line as you. I'm currently on CD 10 and still have AF with pretty bad stomach cramps when they've usually cleared up by now. AF is normally 7-8 days for me. I've also felt really teary, upset and tired. I thought I had pg symptoms earlier in the month before AF as I felt sick on several occasions and temperature was higher than normal, but didn't seem to have a bug and didn't actually vomit, so I'm thinking that most likely I've probably had a chemical pg. I didn't get a BFN but apparently you can still have a chemical pg without a BFN if it's very early.
Have you considered this as a possibility? (Sorry, not trying to scare you but it sounds similar to me.)
I don't have any experience of miscarriage, so can't offer any advice there, but if it was me and I was spotting I would DTD on ov day anyway. That's just what I would do, but maybe someone else can advise you better on this than I can.
Sorry ladies, a bit TMI, but a little bit concerned:
I usually have pretty regular periods, heavy but regular. I had a miscarriage in August and last month my period felt more normal and lasted the usual 5 days. This cycle, I am still spotting with old, brownish blood and the occasional brown clot.
I am due to ovulate on Friday (CD16) but got EWCM today (CD13) but it was a brownish colour due to spotting. has anyone else spotted for this long?