My period was supposed to start 6 days ago

My period was supposed to start 6 days ago... it never came. Took a test Wednesday that said negative. Took a test yesterday and this morning and they both read positive! I'm very excited but very nervous. It's my first pregnancy and at 35 years old I know the miscarriage risks are high. My husband works off shore- they way his schedule falls, last month was the last window of opportunity we were going to have for quite awhile. Prayers this pregnancy stays and a healthy baby enters the world October 2017!