Tips? Please

Naysha

At the end of June my husband and I found out we were expecting(again after a miscarriage 2 years ago), I was having lots of pelvic pain and in July 15th I was told I was miscarrying again :( at 6weeks. I was sad but I was trying to be positive. Today I took a pregnancy test and it came back positive, I'm having some pelvic pain again. And I didn't even get a period. I don't know what to think. I called my doctor and she thought it was really early and scheduled a blood test.... any tips on how to not miscarry? I hope it sticks!!!!