Hello, apologies if this is posted in the wrong place (I've tried conception but had no response and thought that this might be a better section to ask in). I just wanted some reassurance/success stories(!). 
We are about to start trying for our third child and since having DD2 five years ago my periods have gradually got shorter and shorter. Currently they just last a day and a half, when I used to be five days like clockwork.
I have been to the doctor about this and they took blood tests and nothing out of the ordinary came back after my results. I'm just panicking because I thought a period had to be longer to sustain a pregnancy. I've had other tests for mid cycle bleeding too which has also come about after DD2 but again, no explanation. It just seems since having DD2 my cycle hasn't recovered. My doctor has started asking me about menopause symptoms and I'm only 34!
So, my question is whether any of you have managed to get pregnant if your periods were shorter than the average 4-7 day cycle? Thank you very much.