Baby #4 and almost 40 years old

Destinee

I am 8 weeks 1 day with my fourth child. My oldest is 17 and my only girl lol. I have a 13 year old son and a 2 year old son. My husband and I both feel this one is a boy too. I will be 40 in July so I'm quite nervous about having another baby so late in life. Any advice?