Well I'm glad you figured it out, and that is VERY rare, especially with twins, I guess you're the one in a million!
well i kno they can be wrong becuz with my twin girls my blood didnt show up till i was 5 weeks and 6 days...my period did come on tho but thank you
If you had a blood test, and it was negative, you're not pregnant, blood tests are VERY accurate, from very early on, and it is like one in a million chance they're wrong, very very rare.. so I'd say no, you're probably not. You can contact your OB/GYN about why you're not getting your period though!