TTC after Miscarriage on 4/25. HELP..

Erika Lyn • TTC, PSCO, MC 2015/2017/2019 Bio Son: 1/3/10 Adopted x2 Daughters 11/4/20 Adopting Son 6/10/2021 Pregnant DUE Date: 11/11/21
Okay ladies, my fiancé and I experienced a miscarriage in April we conceived the middle of March.. I did not need a D&C and I was able to successfully discharge everything naturally.. According to my body I normally ovulate between 9 and 10 days after I start my period.. My ovulating window was June 1 through June 6.. But I noticed my temperature drops significantly but never got a high spike I started at 96.5 and the highest it got that week was 97.4, my Temperature also dropped a second time to 96.9 that same week.. 
Have any of you women experienced this? Could my body not have dropped an egg because my hormones were so depleted from the miscarriage?? 
My periods are regular and I usually start the 24th of each month so I took a test today it came back negative but I am still a week away from starting my period. This pregnancy test can only detect up to five days early. 
My doctor says for my fiancé night to keep trying for the next 8 months and if we don't have any results then for us to come in.. But wow!! 8 months!! 
* *we do have a five-year-old, this would be my second pregnancy**