So many questions!

So I found out on Tuesday that I'm pregnant, probably about 4 weeks along. I'm terrified of everything. So scared I'll end up miscarrying because I'm considered a high risk pregnancy. OBGYN doesn't want to see me til I'm 7 weeks. I have so many questions. Should I avoid lifting? Should I not lift anything over a certain weight? Are there certain household cleaning products I should avoid? Foods I should eat? Foods I should avoid? I want to do everything in my power to have a safe and healthy pregnancy and baby, but I'm scared to do anything without making sure its ok. Any answers are greatly appreciated!