Welcome to MDC!!Â
 I took a look at your charts and have a few questions/comments.  How many pp cycles have you had? If AF has just recently returned I am not at all surprised to see fluctuating temps, inconsistent CF, spotting, and a short LP. It took over a year for my cycles to regulate after AF returned pp with my first. So it really can take a long time for your cycles to normalize. In addition, breastfeeding and nightwaking definitely can mess with your temps and CF making things a bit confusing. The reason I bring this all up is b/c I would not be surprised if the spotting/bleeding you're getting is hormonal and not implantation or AF. I'm not fully convinced that you ovulated, so the bleeding could be annovulatory bleeding. But at the same time, you do appear to have a general group of lower and slightly higher temps that could indicate O, it's just hard to say.
Â
FF gave you dashed crosshairs, which means it's not quite sure about your O day either. I see some quite erratic temps and I also see that your temps are very low and do not get much higher after supposed O on CD 20. While you do have fertile CF and your CP indicated impending O, your temps shift is not super obvious. It is quite normal to gear up to O and not succeed, especially when you first start your cycles again pp. Lower temps can also be sign of hypothyroid issues or low progesterone.  I'm not saying either of these things are an issue for you, but it is conceivable that as your cycle is regulating you're a little low on progesterone, causing the spotting and low temps. Did you chart prior to getting pregnant? What were your temps like then? Have they always been low? This could also just be your pattern.
Â
HPT's on 11 and 12 DPO might not be accurate so I would go ahead and test again tomorrow when you would potentially be 14 DPO. Be sure to get a test that only requires an hCG level of 25. It's also not uncommon to have temps remain above last cycles CL during AF, but they should dip shortly after. Of course, with your erratic and lower to begin with temps this may be hard to spot.Â
Â
Otherwise, I would expect you to gear up to O again within the next couple of weeks. How have you been temping? Do you focus on the same wake time each morning? For me, I have found wake time to be the most important factor vs. making sure you've gotten a solid block of sleep prior to temping. You might also find vaginal temping to be more consistent. Anyway, you should have an answer with a week or so... BFP, signs of impending O, or a more obvious temp spike. Good luck!