I have a fibroid behind my uterus it's the size of a quater will this stop me from getting pregnant?

Very unlikely: The relatively small fibroid you discuss being "behind the uterus" is very unlikely to cause you any significant limits to pregnancy. If it grows as they do in pregnancy it may cause symptoms of pressure or constipation if impinging onto your bowels. Probably not worth removing at this time.

Depends : The size of the fibroid is small based on your description, which means it is unlikely to affect fertility. However the location within the uterus also needs to be known. If the fibroid is close to the surface of the uterus, it is unlikely to affect your fertility. However if the fibroid is located close to or in the cavity of the uterus then fertility may be affected.

Probably not: If the fibroid is in the muscle behind that uterus and is only the size of a quarter, this should not be a problem. If it is actually in the cavity or submucosal, you may want to consider having it removed if you are having trouble getting or staying pregnant.