Afternoon all,
Had a stonking 20 miler this morning. 15 miles of unrelenting hills and 5 flatter bits. I was expecting to struggle at some point or another, which is what usually happens, but I actually felt good all the way so am very happy. My right knee is a bit niggly which is a regular occurrence at this stage in my training so I shall be off to see Mary Massage Lady soon for an overhaul 
Sorry to read some of you have been struggling 
Denise, we all have days like that, so don't worry! Hope it went better for you today.
Fenn you were wise to stop before you did any more damage. RICE for you and definitely no running until it is fully healed. There's plenty of time to recover if you're sensible. I agree with Jim about cycling as it is hard on your knees. In the past I've done swimming holding onto a flotation board and just leg kicking to strengthen (but I hate swimming so it's not something I'd do again!).
- Oh and on the back-to-back marathons, the most I've done was 3 on consecutive weekends so this year's double followed by a streak seems quite normal, or what passes as normal in redheadland 
Bigeater, definitely no need to do any more than 2 x 20 milers (it is your first marathon isn't it?, sorry if I'm getting confuzzled) and I question the need for a 16 and an 18 too and would go for one or the other, not both. Also, make sure that you have a really good taper period as that is something a lot of people don't do and they keep pounding out the miles relentlessly leaving not enough time to recover before the marathon.
Jen, hope your 1/2 went well.