Baby's gas is normal at this age as she has still maturing digestive tract, especially first 4 months.
Excessive burping during feeding indicate that baby is taking a lot of air during feeding so you might want to change the position for feeding.
Excessive gas and farts indicate that baby's digestive tract is still maturing.
There are several exercise you can do to remove baby's gas from the stomach like putting gentle pressure on her belly but wait atleast 30 min after the feed, it's called tummy time.
Burping her frequently will help her ease the gas.
You can bicycle her legs gently as it helps in the moment of feed.
Feeding should be done in upright position as it will help the baby to slow down a little while they drink. Check for paced feeding method.
Baby massage helps the feed to get through her digestive tract easily since her tract is still getting mature.
Next Steps
If you are still worried, I would suggest you go to a pediatrician first and let them do a check up on her before you start any homeopathic medicine.