My husband had the vasectomy done six months ago, is it possible for me to get pregnant?

Always possible but: Assuming your husband has had his sperm count verified to be zero, the risk is roughly one in a thousand per year of trying. Not zero but very small--one tenth of one percent.

Confirm no sperm...: Post-vasectomy semen exam is mandatory to confirm no sperm in it. Usually, in 2 months after vasectomy or after 15 ejaculations, post-vasectomy semen will contain no sperm so precaution against pregnancy has to continue until semen shows no sperm; sometimes, it takes up to 6 months or more to become sperm-free. But overall effectiveness for birth control is up to 99.85%.

Unlikely if no sperm: Vasectomy is safer, cheaper, and more effective than a woman getting her tubes blocked/tied. It will not affect a man's sex drive or ability to ejaculate b/c that's dependent on the prostate/seminal vesicles that aren't affected. It's irreversible; ppl who try have limited success. It takes 3 months to make sure the vasectomy worked and is not 100%, but very very close. No needles/scalpels needed!