Later ovulation than normal?

Lauren • Our little miracle Caroline arrived 1/28/15! Thanks glow!
Hi ladies, I usually have a 26 to 27 day cycle. I normally ovulate on cd 13 or 14. I started up running again in february and since then I've ovulated on cd 16 the past two months. I had an 11 day lueteal phase last month and 12 this month. Do you think that's long enough? Are there any natural supplements I can take to extend this? Thank you!