Loss of Appetite

Hi hi, I’m a FTM, at Week 4 Day 6 now. I realise I’m starting to lose my appetite nowadays. I hardly feel hungry too. Is that normal in a pregnancy though? Somehow, it’s worrying me; of course I want my baby’s development to be well and healthy but I can’t seem to force myself to consume at some point. I work long retail hours and require a lot of walking. Nonetheless, I do ensure that I keep myself hydrated and have my bottle of mineral water with me all the time.