Feeling guilty over fast food

As much as I tried to eat healthy, sometimes the taste in my mouth make me crave for fast food like mac and kfc. Oh and also like mala hotpot, chinese bbq skewers (crave only but I think I will avoid) But I know the oilyness and high in fat is not healthy for me and baby. Might even make my bloatedness worse. But if i dont eat, i feel lethargic like very sian. Mouth like tasteless. And no mood for other food. So torn between physical health and mental health haha sorry for the rant. Haha do you mummies face the same issue? I dont rmb how I overcome when I have my #1.