bleeding again

Just when I thought things were looking positive again.  Just when I started to have hope - I start bleeding.  Bright red blood again.  I took progesterone this morning and it stopped....but it has started back up...and so have the cramps.  I think this is it. I don't knowiif this pregnancy is viable.  I also think this will be our last pregnancy.  I can't do this anymore.  I have a requisition for an ultrasound I need to book.  Was waiting till school was out for the summer but maybe I will see about getting it done sooner.  I am very sad :( this wasn't supposed to happen again.  Not a third time.