I’m so confused

So it’s been a very confusing couple of days. I was 5 days late yesterday and took a pregnancy test. Came back positive but the plus on the test was very light. So again this morning I took another test and yet again positive and still a very light plus. Then a couple hours later I started bleeding. Called a nurse and she said that if the plus was very light it’s because I was only a couple weeks pregnant and I was very early in the pregnancy and that me bleeding was either caused by my body cramping so hard I lost the pregnancy or my body is going threw a last period before my body was “getting ready for the baby” and that I should take a test again a week after I’m done bleeding. I’m literally so confused what’s going on. Any advice? Anyone been through this? Help?