Does my chart show possible issues? Something feels wrong

First month temping. My chart is crazy. I had a blazing positive opk on Monday, Feb. 11th. My temps seem so erratic and up and down. I had a major dip on 4 dpo and now a dip below coverline at 8 dpo. Also experiencing light spotting only when wiping from 4 dpo to 8 dpo. My concern is that I either have low progesterone issues or that the spotting will prevent chances of pregnancy :( anybody have thoughts or have a similar experience?

This is our 8th month ttc, first month with temping every morning at 5:30am.