low prolactin levels at 9 weeks?

Ca
My doctor decided to do some blood work and checked my prolactin levels. She said that my level was only 7.7 which is apparently very low for your first trimester. She's not telling me that she thinks that I miscarried without even doing any type of testing like a sonogram etc. to check and make sure. Does anyone else have low prolactin levels because I'm getting very nervous and upset and worried. I am now at 10 weeks five days and I still have symptoms even though they're not quite as bad for something like nausea back pain and hip pain is worse and my breasts are still sore tender and enlarged. So really the question is is it possible to just have low prolactin during your first trimester does that necessarily mean that I miscarried. I'm not really wanting to just take her hunch of this without her doing a sonogram to ensure that there's no heartbeat and no baby or that my baby has quit growing. Any help or input on this would be greatly appreciated thank you.