@ Juhi,
In your main chart, the 8th lord (and 5th lord) Mercury occupies the 7th house. Jupiter sits with Mercury. But in the Bhava chart, Jupiter moves to the 6th leaving Mercury alone. The 7th house is aspected by Mars and Saturn while the 7th lord is in the 6th bhava.
Venus, the karaka for marriage is also in the 6th Bhava. The 6th house is aspected by 6th lord Moon and Ketu.
In Navamsa, Lagna is aspected by Saturn and Ketu while Lagna lord is in the 4th with Saturn and Sun (all three natural malefics).
With all these, your married life may not be very smooth. You also have Kuja dosha (manglik). So chart matching is necessary.