False HIV test - pregnancy

I was recently told that my HIV test was positive and I am 3 months pregnant with my second child.   They are making me take it again because I have been with the same man for 10 years, never had a blood transfusion, shared needles, etc.   I can't think of why it would be positive.   Is there a chance this can be wrong?

[Teak]

Pregnant women are known to give false positives and the testing person should have advised you.

[LIZZIE LOU]

it is not uncommon for this to happen to women who are pregnant.  relax...if you have not had an "exposure"...then you cant have hiv.