37 years old shorter lighter periods

Im 37 years old and still breastfeeding my 2 year old sometimesin the night..my cycle didnt start back untill my baby was 11 months ,iv noticed for a while that my periods have been shorter lighter an only lasting 4 to 5 days sometimes2 to 3 days late sometimesday early.i tried to speak to me gp but they wont see me as im still breastfeeding an sometimes mess up cycles and i should wait 6 months after stopping breastfeeding to see them..i just looking to see if any other ladies have had this with there cycles.also there is talk of trying for another baby and just wondering would this impact on trying to get pregnant again.i came on 2days late an i have only bled for 1 day UPDATE...DOCTORS CALLED AND WOULDN'T ME BUT WHENT OVER IT ON THE PHONE THEY SAID MY CYCLE SOUNDS NORMAL FOR A PERSON THAT BREASTFEEDING AND IT NORMAL FOR CYCLES TO CHANGE...LET HOPE THEY RIGHT