I have a comment first, and then a few suggestions. First, I'm not entirely sure I agree with your diagnosis - red tongue and thin and wiry pulse sound a whole lot more like yin deficiency or heat in the stomach perhaps with an underlying deficiency than just sp qi def - although it could be. Any other distinguishing factors on the tongue (teethmarks, coating, etc.)? I only mention that to make sure you clarify the diagnosis - certainly the fatigue fits but that can come from anything and appetite disturbances are common with pregnancy so I wouldn't read alot into that until it shows up in the tongue and/or pulse. With pregnancy there are lots of ways to get strange symptoms so paying attention to the truly reflective signs (tongue, pulse, etc.) rather than the symptoms is often important.
Salvia secretion (during pregnancy especially) is often akin to morning sickness - just a slightly sick feeling with saliva (like before throwing up) but without stronger symptoms. So your choice of PC 6 is good and should be helpful. The stomach/cv points you used are good as well. I would rethink the diagnosis though and perhaps add some more for the yin or better points to clear heat if you feel that is appropriate.
We often also add the huatuo points for the mouth and throat (c3, c4, and/or c5 whichever is sore upon palpation) - tuina and/or shallow needling can be appropriate. We also regulate the vagus nerve which is manipulated in our system by massaging in the ST 10/ST 11 area - generally best with tuina. Work in this area (particularly on the left side) will often stop these issues quickly.