As per your chart, you would be blessed with the happiness of being a proud mother again. There could only be a slight delay in achieving this. Your fiancé's chart has good support for having a child.
The current ongoing time is not quite favourable as per both the charts and a conducive time starts from Jan 2023 and it spans till Oct-Nov 2023 for both you and your fiancé.
It is advisable to seek professional medical advice if felt along with a diet regimen advised by a nutritionist which would help a lot for conceiving your child.
Cancer ascendant with the ascendant lord Moon posited in the sixth house conjunct Mercury and Sun; Fifth lord Mars posited in the ninth house conjunct North Node (Rahu) and Saturn posited in the fifth house in natal chart and also the DC7. Mars MP with North Node (Rahu) SP ongoing Saturn SSP starts from April 2023.