8 days post op Breast Augmentation of 330cc, anatomical, submuscular. I am feeling severe pain. Is this normal?

Pain is very subjective.  Most people shouldn't experience what you're describing.  You should see your PS to make sure everything is progressing alright.

Pain is subjective and everyone feels it differently, that being said in general at this point you should be seeing a decrease in your pain associated with your augment and its important to see your surgeon to rule out any probems causing the pain

Hello, is common to feel pain after a submuscular breast implants placement, your plastic surgeon must be informed, and he will prescribe a good anthalgic to release you form pain. Just call him and good luck.

Every patient's experience with post-op pain is unique. I don't think it is likely that you will get much useful advice over the internet--a call and visit to your surgeon is in order. There are sometimes complications of surgery that can be the cause (bleeding for example) and these would need to be addressed.Thanks for your question, best wishes.

Based on the information that you provide I feel it would be important that you contact your plastic surgeon for an evaluation it is possible that something else could be going on!