Hello ladies

I need some help I’m 5”3 weigh between 290 to 305 ( my weight has been up and down lately) but me and my partner have been trying to get pregnant for the last 5 months and nothing has happened l. I’ve talked to my doctor and she said just give it some time, but suggested on losing weight. Which I have , I was way heavier about 2months back ( I’m really happy I’m keeping it off) . I don’t test to see when I’m actually ovulating , we are hoping it just kinda happens on its own on the right day!! But now I’m starting to think I should get the ovulation tests. My partner has recently just expressed that he’s feeling down about us not being pregnant, it’s bothering him so much that he’s made a doctors appointment to get checked out. I haven’t be diagnosed with anything. Last year I was tested for thyroid issues among other things due to some health issues and everything came back negative and all my numbers were where they were supposed to be I’m not diabetic either. I don’t know what else we could do so we can get pregnant. Any advice!! Please and thank you