20 weeks scan

Sarah
So today we had our 20 weeks scan and found out we have CPP. So aswell as seeing the placenta clinic in 3 weeks to check my placenta is fine. And the extra growth scans, iv to now have a scan at 36 weeks to check on the location of my placenta!! Either way im having a elective c-section. Anybody had this before? Do knew do ot sooner than 38 weeks? Midwife didnt explain anything was in and out in 5 minutes! All i got was a leaflet to tell me what it is 
Thanks in advance