Misty, you will be in my prayers.  I know how fearful it can be to think that something could go wrong.  When I was pregnant with my 4th child (Brayden-SWCAH-14 months old) a 3-D Ultrasound showed up something abnormal with his brain.  Another ultrasound was done and both showed that the 3rd ventricle in his brain was enlarged.  I have NEVER been so scared.  So many people prayed for us, and I had to totally lean on God during that time and trust him that NO MATTER WHAT, He would help me accept what He was going to give me.  Of course though, I prayed that everything would be okay.  I was sent to a specialist and another ultrasound was done....this time, there was NOTHING abnormal. I give all the glory to God.  Just trust Him with this little one you are carrying.  He knows what’s best, even if we dont always understand. 

I’m around your age ( I’m 27) and I know what you mean by thinking "Woah...I’m 26 and having my FOURTH child!!".  Trust me, your in for a wild ride! It’s crazy around here, but I love each and every one of these kids. 

By the way...I also spotted with two of my pregnancies...and both kids are happy and healthy :)