Should I keep waiting and testing ??

My husband and I have been TTC for 6 months. Af is 30 days late, I tested after 4 days late and then again on 27 days late both negative. I have PCOS and have a high level of testosterone. I have been told that my HCG levels may not be high enough to detect on a pregnancy test, I do not have insurance and have had No AF symptoms at all. Any opinions on what's going on with me?