No pic - Spotting at 7-8 DPO.

Athena • Pregnant with baby #2 (#1 = angel), 31yo, DH 34
Ok, I need your help. I usually spot before AF, BUT this is the first time spotting so early! I'm not thinking it's IB because I've read that typically happens in less than 30% of women. I've had sore breast for the past 2 days (worse in the morning). What is going on?? I hate to ask the cliché question, but could this be a sign of pregnancy?