The views expressed by me are for educational purposes only and do not establish a doctor patient relationship.
Thanks for your question.
HIV was not prevalent in 1970s.
HIV came in 80s.
Hence, the risk of HIV from IVD is not there.
The risk HIv from sexual transmission is very low if you had only one sexual partner.
So, hence you are likely HIV negative.
You can confirm by taking a rapid HIV antibody test which is very sensitivity.