Dont know what to do!

My last period was October 30 and only lasted 3 days. When my next period didn't show I tested and got 3 faint positives and went and had blood work done. That came out negative. My doctor told me I had a chemical pregnancy. My question is, that was 3 weeks ago almost 4 and I still haven't had any bleeding! I tested two days ago and it was negative. So k ow I don't know when I'm ovulating or anything. This is getting so frustrating!!!! I asked my doctor what I should do and she just said that if I don't get my period in 2 months to retest and then call back.