15dpo 16dpo spotting :( help

Hi my husband and I have been TTC for a while..

1.I started tracking my ovulation using clear blue digital ovulation kit. Ovulated on 29th January

2. I was supposed to get my periods on Feb 12th. I didn't get it no spotting

3. 15th dpo very mild spotting I could have easily missed it . Mostly brownish (only in AM)

4. 16th dpo again morning I am seeing spotting. Easy to miss.

All my pregnancy tests turned out to be negative. It's so emotionally draining. Almost cruel:( I would have atleast had some peace if my AF started but it didnt. Can I still be pregnant?