Welcome to HCM.
As you got high LH surge on June 13th,detected by Ovulation kit and did sexual intercourse on that day. So probability of pregnancy
But you got heavier bleeding from June 27th with cramp right side. It is due to early implantation
bleeding or miscarriage
You do a USG scan of lower abdomen to check placental bits or any remnants and whether D& C needed or not. Always consult with your doctor.
Maintain personal hygiene to avoid further infection.