First and most imortant thing for you to do right now is show yourself some love and be kind to yourself. There is nothing pathetic in what you wrote or how you feel. Day 3 is nothing to be sniffed at, you should be very proud as all of us here know how hard the first few weeks are, but you've done it, you are doing it!
AA meetings are a good place to meet people who understand but if you're not ready for that or unsure maybe try some online SMART meetings. There are many of them in the US daily and you can even join the ones in the UK. You can be anonymous and talk if you want or just type in the main meeting chat, or even just listen in the background. Hearing others that are going through the same struggle really helps to not feel so alone and also see how hard we can be on ourselves when we should be giving ourselves a hug and a break.
Keep posting and hope you stick around, SR is a wonderful place and lots of very supporting wise heads here, no judgement and a community that really understands. xx