My son is just about 15 months and breastfeeding. I've had two normal periods that came back in November and have tracked my ovulation as being late in the month. My son has reduced his feedings a bit and I've been trying to cut him back more when he will let me. We started TTC last month (December). I got a really bad bout of mastitis during Christmas and was pretty sick. I took an ovulation test the 24th and it was positive and so we DTD. My AF was supposed to come back the 3rd but nothing. I've been taking pregnancy test and they are negative. I've had two VFL and almost all others are Evaps but the positives were a few days apart with Evaps in-between. I've been a little nauseous, super thirsty, may have had dark spotting the very end of December, and have had lower back pain. But negative pregnancy tests. I also have a Fitbit and my resting heart rate is up a good 9 beats per minute. Any recommendations and thoughts?