Cathy O'Neill is calling for a change in breastfeeding legislation.
The petition began after the DUP's Sammy Wilson accused breastfeeding mums of exhibitionism.
She started a petition to bring Northern Ireland's legislation in line with Scotland's.
This would make it an offence to stop a child from being fed in a public place.
LISTEN: Michelle Major, a petition supporter who will be with Cathy at Stormont today, has been speaking to Q Radio's Iveren McCallion.
Woman in critical condition after she's struck by car in Belfast
Man dies following road accident in County Fermanagh
Executive will ‘have to deal’ with compensation costs from PSNI data breach
Man remanded in custody charged in connection with mosque burning plot
Woman charged over breaches at abortion safe access zone