Soulja Boy's baby mama says her defamation lawsuit against Blueface is taking an extreme emotional toll -- her lawyers say she's seeing doctors and taking new medications for anxiety and insomnia.

Jackilyn Martinez's attorneys, Vadim Yeremenko and Tara Licata, tell TMZ ... their client is feeling distressed over Blueface's statements about her child and threats she says she's getting from his fans. We're told she's been seeing a therapist and a psychiatrist, who have prescribed her meds.

TMZ broke the story ... Jackilyn sued Blueface after he said they had sex the day before her and Soulja Boy's baby shower back in 2022 ... and insinuated the son she shares with SB could actually be his.

Blueface took more jabs at Soulja and Jackilyn in a series of social media posts ... and as a result, we're told this whole situation has sowed discord between Soulja and the baby boy.

We're also told Jackilyn and Soulja Boy now have minimal communications themselves.

Jackilyn seems to be going through a lot ... her lawsuit claimed she received death threats from Blueface fans, and now her legal team tells us she's since disabled messages on social media.

The lawsuit was filed in December and lawyers tell us they served Blueface while doing a meet and greet at Fountain LA in Koreatown ... the same night our photog got him there with Jaidyn Alexis.