Elevated ca125

Hi everyone, this is my first post. I suppose I'm looking some reassurance, Due to really bad backache last week, to the point I couldn't stand, or function with my young family, and my cycle being hard on me each month I rang doc and I had a bloodtest done which showed my ca125 level elevated to 162 doc has red lighted me for internal scan it's booked for 22nd Feb. After googling what ca125 even is To say I'm panicking is an understatement. I'm 40 years old have 3 young children, have had 3 csections due to complication in pregnancy. Had my tubes cut at last csection as doc didnt recommend an more babies for me.

Also the doc gave me anti biotic because apparently I had a uti. I have asked the doc would the uti raise the ca125 level and he said yes but usually not that high so best to get checked.  

Obviously I'm freaking out. I wonder if any of u ladies had a positive experience or outcome to share with me