Milk supply in fourth n fifth month

My daughter is 10 weeks old and i exclusive breastfeed her. I roughly generate 2.5-3.5oz of milk every session and generally feed or pump seven times daily. I dont feed/pump at same time everyday. I have only 10oz of freeze milk and generally she drinks 20-24 oz daily. I am going to start work next month and are concerned regarding milk supply n her growth spurt in fourth n fifth month. I am planning to pump twice in office and rest breastfeed her as much aa i can. Do you guys think i will be able to exclusive breastfeed her with this much milk supply in fourth n fifth month. I really want to exclusive breastfeed her.