u/Dear_Vermicelli8595

I am impatient by nature and I really enjoy the training and marathon running so I have booked a marathon in aughust and December (in my haste) now I have just completed London am disappointed as I fell badly so had a 20 minuite sit down and cry and run walked the last 6miles when I was on pace for sub 3:50! As I result I have time to contemplate that this might be a bit much for a strong performance in both so want to know would I be able to race both or would it be better to not attempt August and focus on December and get my 10km and half marathon times faster in the summer?