I Was A Breastfeeding Mum But Since 2 Months I

I was a breastfeeding mum but since 2 months I left it as my son turns 2.3 years .
I have my normal period cycle on 28-30 days and last for 5-7 days
but since I has my last cycle on 14th April that last for 5 days , I have not had my periods and its not because I am pregnant because we have no intercourse .And now since around 2-3 days I have noticed my right breast is relatively larger and hanging down more then the left once , I can feel the difference its not yet noticeable by any one but I know there is a difference and its bothering me .

about 2 weeks ago I was having some tinging feeling on my left breast also and has desire to rub the area on left breast ,,, now I am totally confused what the issue is ,,, there is no pain at all except that my period is not happening despite all symptoms which I have before period , I have pimples on both cheeks etc ..

Please advise if there is any thing to worry at all or is it just hormonal . Thanks