TTC after Implant removal

I had my nexplanon removed 1/9 after about 2 years. I had just had a period before removing it (12/31-1/5). My SO and I have been ttc since the removal. I am now 11 days past my CD. My doctor said my cycle should go back to normal but it hasn't. I took a hpt at 2/7 but got a BFN. I'm anxious to take another one but is it too early? I would love to get a BFP on Valentine's day! I'm 24 and I've been on BC since 16. This is both of our first time TTC so we don't know what to expect. HELP !!!!