My Husband And I Are Trying To Conceive. I Started

My husband and I are trying to conceive. I started my period on June 5th and ended on June 10th. I started ovulating on June 14th. I woke up this morning with some minor spotting that was brown in color and has slowly gotten a little worse with very minor cramping on and off threw the day. the color of the spotting has gone from brown to a very dark red and is less in amount then a light period. I am worried somethings wrong I know its to early for any kind of implantation bleeding. We really want another child and have had a miscarriage before.