I did worse on PT73 than my diagnostic (ignoring LG). I also freaked out and spent a good amount of time lurking forums and it seems to be a pretty common thing. Just keep calm and I'm sure you'll be back at your average in a PT or two.
This was my first BR and I really like it, thank you @keets993 for everything. Today I completed my blind review in all the sections. So please let me know if are you guys going to do S4. Thank you.