Is all hope gone? Want to reestablish milk supply

Shani
My daughter was in the NICU for 2 months and towards the end of her stay she was diagnosed milk protein intolerant and she had to be on formula so she can be discharged since they "ran out of room". It's been 3 months since I pumped and I want to start it up again. Is it possible? She's 4 months 2 months adjusted