Breastfeeding and irregular periods?

Hi,

I hope I'm posting this in the right section.

My DS2 is nearly 6 months old and he is breast fed with one or two bottles of formula a day and also eating solids 3 times a day.

I know it's different with every bub but I got my period back when DS1 was 6 months old and my periods were regular pretty much straight away and DS1 self weaned from breastfeeding at 7.5 months.

I got my first period with DS2 back on 15 April but haven't had a period since. I have done about 4 pregnancy tests as in all my life I have never had a cycle over 30 days and its just strange for me to currently be on CD35 without AF showing. My cycles have always been between 23-25 days.

Is this normal to have irregular periods while breastfeeding and common? Anyone else experienced the same thinng?

I was told just before I fell pregnant with DS2 that my ovarian reserve was low and FS was going to start me on Clomid but I conceived naturally that month. Could an even lower ovarian reserve now after DS2 cause me to have irregular periods now?

Thanks.