7 months and baby refusing breast, help

My little is 7 months old, and I have been successfully breastfeeding this entire time. Lately though, he's been refusing me. I had to go back to work when he was 9 wks old, so bottles from daddy and a paci have never been a problem. However, I've just had 3 weeks off of work and now he's refused me last 2 days unless it is at night. He eats 2-3 oz of puréed food a day. And always at the same time. I'm getting a bit frustrated. I am not ready for him to wean himself. And I'm back to work on Monday, so I can't not give bottles or a paci to try and get him back on. Any tips? Thoughts? Similar situations? Breaks my heart when he screams at my breast....