The good news is that it looks like it is a pretty young infection, so it likely hasn't really affected the beer much. Even if it has, people like me pay good money for beers soured with lacto.
Speed this thing through your process and get it carbed and cooled as quickly as possible if you want to slow down the infection. Even if it's a little tart/acidic to your tastes, you could always blend it with another batch.
If you like sour beers, move this thing to another secondary off the raspberries when that fermentation is done, and let it sit at room temp with the lacto infection for about 6-8 months to create a delectable sour that you can either drink straight, or again, blend with something younger.
Good luck!