Talk to Gynecologist on Pregnancy

Last Nov i had ectopic pregnancy for which i was given methrotrexate, pregnancy dissolved without any damage to ovaries. But during ultrasound a hypoechoic structure was found in posterior cul de sac. It was first found in nov, then déc, then jan and then again in April. Dr was hoping it was baby tissue n it will dissolve itself but it didn't. Now dr said it may be a fibroid so leave it as is, i am worried please look at reports and suggest what you think it is and what i should do now. Thank you jazaakAllah