low progesterone

I've had 4 previous losses and with the last one, they noticed I had low progesterone.  I'm now pregnant again and again I had low progesterone and estrogen.  Dr put me on pills for both but my question is, has anyone been diagnosed with low progesterone and go on to have a healthy pregnancy? The reason I ask is because I have heard if you had low progesterone off the bat, it's not a viable pregnancy to begin with.  😔