Please help!

So about a month ago I was diagnosed with a 2 cm complex cyst on my right ovary. It was found because I was experiencing some pain and my gyno sent for me to have an abdominal ultrasound. So once he saw that it was complex, being that it was only 2 cm My gyno said to do a follow up transvaginal ultrasound in 4-6 weeks. I went in for the follow up transvaginal ultrasound just recently (about a week ago) and was told the right ovary contained no mass or anything. But I’m still in pain on the right side like it is still there. I’m confused as to why it still hurts. 😕 I was told I have a simple cyst on the left ovary now. Starting birth control next month. Any ladies have any experience like this or any insight would help!