I had no idea when I conceived (it was after a miscarriage before I had a regular period), so my doctor gave me an early ultrasound to give me an estimated due date.
well i started May 15th. went 5 days like normal. started on June 16th but only went a day and half of very very light bleeding. i thought that maybe could have been the implantation bleeding. i never go only a day to a day and half ever. it is 5 days of full force AF.
You could have conceived in May or June - there really is no way of knowing from the information you have provided. The light bleeding in June could have been implantation bleeding or an off cycle. Its impossible to tell from what you have said.