Super Excited but Super Anxious

Got a huge dye stealer today, and if my dates and the app are right, I’m 4weeks and 2days. This is definitely a planned pregnancy and I’m beyond thankful for the outcome. But now I don’t know what to do. I’m worried I’ll cough wrong and it’ll hurt the baby. I’m worried that just me stretching or bending down can cause harm. We’ve planned this little miracle and I’m afraid any and everything can jeopardize this. This is my first pregnancy, but it’s important to me. My first doctors appointment isn’t until October, but I have so many questions now. What do I eat? What should I avoid? What causes miscarriages? How likely is it to happen? Is my anxiety bad for the baby? How bad? I just want things to be ok.