SKINNY and pregnant

La
i am 4week and 3days first pregnancy 19 and so scared because when i get on here all i see is miscarriage ☹️ I've always been small my entire life so I'm worried about my weight during pregnancy I drink a lot of water but what should I be eating and how many times of day should I be eating .. I have no signs of miscarriage but it's nerve wrecking reading about it I pray that god allows me to have a full term healthy pregnancy