Light pink Spotting Valentine's Day and the day after (2 days)?

Hi,

I had very light pink spotting that turned rust colored off and on for 2 days (2/14 and 2/15). No spotting Tuesday or Wednesday and most of today. Just used the bathroom and saw light pink on the toilet paper again. Weird feeling in left side of pelvis since Sunday. Extremely moody/emotional (have never been this moody or emotional in my life) since Sunday. Moodiness has never been a PMS symptom for me. I am now 11dpo. This all started at 7dpo (8 days before AF due which is 2/22). I have no clue what could be going on so any clues would help! Thanks!