TTC for 2 years...

My husband and I have been ttc for 2 years now and I had a miscarriage August 1st. All I can think about is having a family and I feel very sad and even mad when my friends are getting pregnant even when they are not trying. Is this normal? Also, we started trying as soon as we could right after, I've been taking OPK all with negative results. I have not started my period yet, but have taken pregnancy test that are negative, is it too early to tell? Has anyone gone through this and how long did it take you get back back on you cycle/ovulating?