I think your title says it all, the WTF cycle. From what you have said it does sound in keeping with the random nature of periods before they fall back into a regular pattern - if they were regular? I hope someone else can give you their views also. Good luck and sorry about your MMC.
I had an ERPC on 23rd Jan following a missed miscarriage at 11+6 (baby measuring 6+2). I bled for 13 days then had on off spotting for the next few weeks.
4 weeks to the day, I had 3 days of brown thick mucus which needed a panty liner but nothing more - was this my period? I had assumed it was just more random spotting. I'm nearly 6 weeks since ERPC and currently have fuller boobs which are slightly painful and feel bloated - things I would normally get just before period/pregnant but there's no sign of it turning up and cheapie internet tests are coming back negative (these have always given me a positive early).
I did have sensitive nipples/sore/bigger boobs around time of ovulation and leading up to period when I then found out I was pregnant last time (first period since having my son last Jan) but I was still breast feeding so it was more pronounced then but assumed it was to do with that and it's only dawned on me this morning that this could be a new sign of ovulation.
Any one got any experience of this? Would just like to work out if I'm in a new cycle or not!