My last baby was born the last week of June 2014 and I am around 9 weeks pregnant also. I haven't seen the Dr yet but that's what I've calculated. They will be about twelve months apart. My two littlest one right now are 17 months apart. The two in diapers isn't as bad as you would imagine. ( I will probably have three in diapers for a little while) . The gap between my oldest and my second child is four years, I find the closer gap to be easier because you are still in baby mode.Just get used to doing things for them at the same time. Change them at the same time, baths, bottles/feeding. Once you find a routine it isn't so bad :) good luck!
My two eldest girls are close together I've never heard of complications due to being close and its easier to fall preggers sooner. I think my 2nd birth was a breeze...less labour time by a mile cause my body remembered how to do it from the first time. As for the nappy situation its a little hard but you'll adapt...I did. Im actually glad mine were close cause they're thick as thieves now and its so awesome they are growing together whereas if there was a big gap they find the bond a lil harder. Theres 15 months between my first two then 20 months from the 2nd to the 3rd girl. They're like the 3 musketeers lolz.
My kids are 12 months apart. It's not easy, but you'll adapt. I didn't have any pregnancy or birth complications with my younger one.
That happened to my sis. She got pregnant 3months after she gave birth