dont beat yourself up. it happens. At least you got her the care she needed. Although not impossible, 6 months is a little early for coming into heat though. I wonder why your vet didn't recommend other testing?
__________________  The T.U.B. Pack! Toto, Uni, & Bindi
RIP Lord Scrappington Montgomery McLimpybottom aka El Lenguo the Handicapped Ninja 10-12-12 
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