Enduring the 2 week wait. Short luteal phase

Katie • Trying for our first baby. 31 year old
I'm only 1 DPO but on cycle day 21 and I'm SOOOO moody, crying at anything, being anxious, picking little fights. I hope this isn't a sign of AF coming soon. 
​I'm concerned because my luteal phase is so short (9-10 days). I worry this isn't enough time for implantation. Thoughts?