Hun, that baby will take everything it needs from you no matter what you do! Its needs are looked after well before your bodies iykwim. My story was completely different but during pregnancy I lost 15% of my body weight through hyperemesis and dehydration and still birthed a healthy 7lb 9oz baby girl. Maybe others will disagree but you cant force yourself to be hungry when you're not.

Dont stress and dont beat yourself up, just eat healthy and eat what you can, when you can