1. Make sure there are no ticks present on your pets body (Start anti tick treatment)
2. Medications for Babesiosis vary, a treating doctor would decide the line of treatment looking at the severity of the disease.
I would suggest you to visit a veterinarian.
When my golden contracted this, the vet gave 5 different types of tablets - anti biotics and antiprotozoal. 4 were for 10 days morning and night, and 1 was for 3 weeks - 3 times a day. Finally after 3 months of the treatment,, 3rd month pcr test showed negative. Please note it is a serious disease, we lost the other golden(male) to it, so please start treatment asap. All the best