Trying again after muitipul miscarriages

Hi everyone so me and my OH are trying for our third after a break due to me having a number of miscarriages... and I'm already worried that it's going to happen again.. it devastated me last time as they where all so close together and I now only have one ovary and fallopian tube due to previous life saving surgery for a ectopic pregnancy that was misdiagnosed for ages.. I'm scared that when I do fall pregnant (i have no trouble getting preg ) alls I will do is worry that everything I feel will be a problem and it will end in miscarriage again.. has anyone else been through similar and any suggestions on how to cope with the worry