Don't stress hun. I know you want to get organised but you can wait and see how warm it is and if what you have is adequate. You can always use the short sleeved stuff, a wrap and an extra blanket in the short term. I am sure someone would be happy to go shopping for you and wash the clothes if you need to buy more.

It was warm in SA last year so DS wore singlets and wraps on some days and wondersuits and singlets on others.