Postpartum periods and weight loss

I am waiting on my third period 4 months postpartum. Before baby my cycle was like clockwork. I got my period (or what I thought was my period) about 8 weeks pp, which was a surprise as I’m breast feeding. With my first baby I didn’t get it back until I was 4 months pp.

I had gestational diabetes for my second baby, not my first, and my pp glucose numbers were not great. I do not have type 2 diabetes but my endocrinologist said lose as much weight as possible and we will test you again in a year.

So I’ve been on top of it and lost 8lbs this month so far. Could this be the reason for period deciding to not show up?

I am 90% sure I am not pregnant as my husband and I have had sex very little in these past four months ( breastfeeding kills my mojo lol) but each time we were safe, ie. condoms.

Long story short, is it still possible for my period to be normalizing given all that background info? 4 days late. My selfish reason for asking is we have a beach vacation coming up beginning of May!

(footage of me from our last beach holiday 😝)