Pregnant??

A few weeks to a month ago, me and my bf had unprotected sex ( I’m 24), he finished in me. I took 3 tests last week because I was feeling a bit weird/ off (1. Negative 2. Faint line i think 3. Negative). However, I’m almost 2 weeks late. Should I retest?& I was recently heavily drinking. If the test is positive would something be wrong with the baby????