Irregular period?

Sh

Hi.

Just wondering if someone could help me. I gave birth to my daughter in February of this year, sadly she never made it, she was born at 24 weeks and 5 days. Since the loss, I bled for a month and a half non stop, which I was told was pretty normal. Since then I have been coming on my period regular, every 28 days. However, I was not due to come on my period until 8th June but I started my period yesterday after 2 weeks. It has been 4 months since I gave birth naturally. Is this normal? Do women tend to have irregular periods after giving birth? Is it just my body regulating or should I be worried?

Thanks.