If you kept everything clean, filtered, and heat shocked properly, you should be fine. The reason you're sore is prolly cuz it's higher concentration. Theoretically, if you use 20g of powder in a 10g kit, you should end up with double the concentration. With enan, you will definitely feel some sorenesss.
You can get BA from any number of sites that sells research chems like liquidreasearch and sciensupply.