Why am I getting an ache & a blood rushing into my boobs feeling especially when I'm laying down?

Hi, I am 12 days post op. This is my 2nd BA 15 years apart from my first. I have gone up 135cc in size from 290 - 425cc. I had a lot of scar tissue surrounding my left implant but I'm getting a feeling of a lot of blood rushing into my boobs if I lay down. I still sleep propped up but occasionally I slide down the pillows overnight. I'm also getting an ache in both breasts after waking up from a sleep. Is that normal? Thank you in advance :)