1st time mom so I'm nervous

Hi I got my BFP on a digital yesterday and today. The only problem is I'm not suppose to start my period till Saturday. I keep having this ongoing fear of AF coming. I keep taking test. I can't go to the doctor until my insurance kicks in August 1st. So I can't do a blood test to find out if my hCG levels are high or low. I'm trying not to stress because it's hard. And I have never wanted something so bad in my life.