Positive pregnancy tests & many questions

so i took 5 at hpt and one urine test at the doctors office and all are positive. awaiting blood test results to confirm what i already know. i have so many first time pregnancy questions it’s making me lose sleep. like for one is it ok that i took medication about two weeks ago? when do i get my first ultrasound? how can i make my breasts stop being so sore? any prenatal recommendation? (wasn’t taking prior to) i’m 35 yr old (just turned 4 days ago.. yay!) and this is my first child. beyond happy and praying for a happy healthy pregnancy but i am a worry wart & i wanna read every book on pregnancy & what to expect!