Trying to Conceive after a miscarriage

So I had a miscarriage back in February My husband and I have been trying again .I haven’t got a period since my miscarriage my dr said to wait at lest to mouths to try again so we did but it’s been hard to convince again idk what going on with my body I had an appointment 2 weeks ago everything it’s normal but than again no period and ever time I take a pregnancy test comes out negative. My hcg levels went Back to normal after 2 months.

what are some tip you lady’s have to convince? Has any of you lady’s had a problem like this ?