One breast filling more than the other?

Why is this happening? What could i be doing wrong? This has been happening in the last few weeks only. I empty one breast and then use the other breast at next feed like both midwife/health visitor told me to. Even if the emptier breast isnt very full he still gets enough though. I dont want my supply to slow down so please tell me what i might be doing???

I must add i exclusively breast feed and dont pump yet.

X

 

Anyone?

 

Thanks for your reply. That explains alot as it is the most comfortable that fills quicker xx