First week of small loss

This is week 9 for me on Mounjaro 2.5mg. My average weekly loss has been about 1.1kg and I’ve lost 11.6kg so far.

This is my first week that I’ve seen what seems to me a “small” loss. I lost 400g. I haven’t changed my eating or exercise habits though.

I did get my period on Tuesday and it was my birthday last weekend so I did have some chocolate biscuit cake. Could this be the start of the weight loss slowing down?

(I know 400g is a healthy amount of weight to lose in one week but I am just questioning it because it’s the first time it’s happened on my journey)