20 week check-up and ultrasound at 21 weeks

Okay I'm not sure how to feel, I guess the best way to describe how I feel is uneasy. Today hubby and I went to my 20 week check-up with the OB along with an ultrasound. First thing up was the ultrasound, it seemed to go well- the tech pointed out various parts, arms, legs- crossed at the ankle like a little lady, heart, head, mouth- yawning etc... I always get nervous when she would stop and seem to linger over certain areas. Of course the tech isn't going to say if there is something wrong. Next we waited to see the doctor. Don't get me wrong it was fabulous seeing our little girl, moving, yawning, her heart beating etc- I LOVE IT!!
Now before I go on with the post I want to say I saw a different OB in the practice than I normally do, my OB is on vacation/ just got back and was super booked up. I have seen this particular OB with my last pregnancy, so I didn't think anything of it. So I'm in the room waiting for the doctor to come in, when he pokes his head in the room and asks if I had surgery because he didn't see the mass on the ultrasound?! Um yes I had surgery and hello did you not notice that I didn't have a right ovary either?! So when he comes back in we of course discuss my recent surgery, he looked at my scars and then we discussed how things were going. He said everything looks good, with baby girl, however the middle part of her kidney appears enlarged. He said that this is common, something we need to watch and more than likely will go away on its own. He scheduled me for another ultrasound in 8 weeks to follow-up. He was reading from the ultrasound report and it said my placenta is bulky and lakey, but he didn't know what that meant- reassuring I know!!! So that has me concerned. I'm especially concerned because the last time I saw another OB in the practice, was the first time they discovered the mass on my ovary however she called it a cyst and was just something they needed to monitor. So when I left the appointment I wasn't sure what to think! I of course did the worst thing a person especially pregnant person can do and that's googled these issues, stupid I know!!!!
I've decided instead of worrying over this for the next 4 wks until my next appointment with my regular OB that I'm going to do three things: 1. Call my OB's office tomorrow and get clarification, see if its something we need to be concerned about etc from my OB. 2. Pray and 3. Leave it in God's hands and try to enjoy the last 18 wks of my pregnancy with Little Miss moving and kicking.