getting bfn but still no af???

hi, frst time posting! forgive the long post but there are details to my question that I'm pretty sure are relevant. I had a mmc at the end on November, with a d&c; on Dec 6th. my doctor told me to wait 1 cycle until ttc again (ive aleyats had a 24-25 day cycle) and I af came 27 days later on Jan 2. and I bled for 16 days. call my doc, she wasn't too concerned about that and it finally stopped. so then on Jan 22nd af came again(only 20 days after last) and I bled for a normal 5 days. so since I waited two cycles hubby and I tried again this month. I used a home ovulation kit and I ovulated on the 4th. I'm now 26 days from my last period (2 days late from my normal cycle) and I've been experiencing some symptoms of early pregnancy but stranger than last time, sore breasts, nausea, cramping, very tired. but I've take two hpt, one on Wed the 14th and one this morning both bfn. is there a chance I'm pregnat? or is my cycle still not right from the m/