Need advice‼️‼️

I have been on clomid for three months and it started to regulate my Period (verging start day by a day if any variation). I am now four days late. I took a test at three days it was negative. I called my doctor as she requested on day three and she told me to start Prevara tomorrow to restart my period.

My husband and I have already lost a baby so I’m scared to do anything that might cause that. I feel like we should wait to be sure we’re not pregnant. I also have PCOS so pregnancy test aren’t always accurate.

Has anyone been in this position? Please, Give me some advice!