bleeding while pregnant

Hey ladies!! I am a little nervous right now. I thought I was pregnant three weeks ago and ended up having what I thought was my period.  After the 5 days I usually have of my period I ended up having a light period for two weeks. Pregnancy symptoms continued to occur and yesterday I began breaking out in random tears. My husband was adamant that I was pregnant so in order to shut him up I went out and bought a test. As you can see BFP!!! I was shocked. I am still bleeding and today started bleeding with more tissue discharging. I want this pregnancy to stick but am so worried I may be having a miscarriage or something!! Any ideas what could be happening? Nurse said she thinks I could have an implantation hemerrage but not even sure what that is.