Bbt chart 21-22

Hi everyone I need some help with my bbt chart. I know there's not much on it but I only started temping again this past Sunday. I know I ovulated either the 21st or 22nd of April because I am one of the lucky that gets really strong O pains. I had a dip on Monday and Tuesday and then a spike today, I'm 8 dpo can anyone give me any advice as to what's going on. This is my first time charting.