Eating unhealthy sometimes

Hi ladies i’m 13 weeks and 2 days. I’m trying to eat healthy most of the time and I’m cooking pretty much every day but sometimes I can’t help myself and I want to eat silly things such as jellies, chips , burgers, French fries. I never used to like soft drinks but now I do every now and then I really need a soft drink. I’m trying to have a ‘cheat day ‘ only once a week. I feel so bad and very irresponsible but these cravings... can I harm my baby ?