The other option is for you to completely ignore what people say and listen to what your body is telling you. On any given day you'll feel like a million bucks and want to run faster and/or further, and on any other given day, you'll feel like crap and have a difficult time finishing your normal daily 3-miler. IMHO, that's how it should be, your body knows what it is capable of on any given day, and pushing beyond that point will only end up in injury.
Keep us posted on the progress your body reveals to you. 