Like squeezy said, rest up! No swimming, no extra walking, nothing. Learn from my experience, when you're injured, just stop. If you carry on then you risk doing long term damage. You might feel the need to keep doing at least something now so that you burn calories but I promise you that it'll be even more frustrating later when you physically can't because you did too much! So if it takes a few days, a week, even a month, you really need to take that time to rest it, I know from experience.
Right at the beginning of this diary you say... "It's just Lisa, not Big Lisa, not Fat Lisa, just Lisa." but then you've put your username as BigLisa. Obviously you can call yourself whatever you want on here but that's obviously not a name that you like having for yourself... maybe you should ask admin to change your username? That's what you were, now you're just Lisa and soon there'll be no reason for you being called Big Lisa ever! Just a thought.