21 weeks pregnant doctor said baby has a choriod pexus cyst on brain =(?

im so confused and hurting right now.. i got an ultrasound at 17.5 weeks and this is where they said they saw these cyst on my babies brain.. they are considering me high risk now.. and are sending me for another ultrasound this time at a hospital next week to monitor it.. im just hurt and don't know what to expect or think =( she said my bloodwork came up negative for any defects and at my last ultrasound they said she looked fine and healthy.. im just at a complete lost my heart is sinking =/