Does anyone know when i ovulated???

Curious to see when everyone thinks I ovulated. On CD17 I got a peak and on CD18 I got an awful pain on my right side (I had this the last time I got pregnant.) On CD19 I had some spotting in the morning that was it. EW cm all those days. After that CM basically dried up (sorry tmi). I know my chart is super wonky, but anyways do you think I actually ovulated in those days? All OPKS have been negative since CD19. Idk how common a fallback rise chart is, but I do know it's possible. If I did ovulate these past few days, is it possible to have no cm at all and LH test all negative and still ovulate?