Implantation Dip????

Maria • Married to my best friend!!!! Have a beautiful little girl (born Feb 7, 2020)Proud momma to 5 fur babies. TTC #2

I wanted to know how does my chart look. Had postive okps and then lots of cramping like if i was to get AF but nothings. I have sore and heavy breast and some ance. Nipples have been itchy as well. From the chart it looks like maybe a dip on 10 dpo. I took a couple of pregnancy test but negative so far. Me and my husband didnt really try this month just because he had to get so xrays and we were trying to be safe and let that pass out his system. Let me know what you think. Thanks