ttc

I'll be 28 this year nd I have 2 kids oldest one Will be 8 this year nd youngest one 6 years old so we planned 3rd baby last year june I got positive then in Oct 2018 I had miscarriage ?I completely destroy myself always cry also lose my temper always doc said bcoz of lots of bleeding u should try after 3 months then again we start to plan in Jan bt still negative I'm taking pregnacare conception also bt still negative I visited the doc she said everything is OK now what should I do