Constant fear I'm loosing my baby!

I've already got a 3 year old. I've had 2 miscarriages prior to the birth of my son and I've had a misscarriage January this year. I'm pregnant around 5 weeks, yet constantly feel I'm about to loose my baby. I have watery discharge which I know is normal, but I dash to the loo every time fearing it's blood. I feel like lying in bed for the entire 9 months just so I feel like I'm not taking any risks.   Since finding out I've take. A test nearly every other day just in fear. 😢