Lactation - Over supply of Breastmilk.

MY BABY IS 1 MONTH AND 3 DAYS OLD. FROM DAY 1 SHE IS ON BREAST MILK ONLY BUT MY SUPPLY WAS TOO MUCH AND USE TO MAKE MY BREAST VERY HEAVY SO I STARTED PUMPING OUT AND NOW I HAVE TO PUMP ATLEAST 3 TIMES A DAY OR ELSE MY BABY STRUGGLES TO DRINK AS MILK COMES OUT LIKE JET SPRAY AND BABY TENDS GULPS TOO MUCH AND THEN SHE STARTS COUGHING AND PUKING OUT MILK. NEED TO KNOW HOW TO CONTROL MY MILK SUPPLY SO THAT SHE DOESN'T STRUGGLE. ALSO SHE TAKE FEEDING OF 10-15 MINS WITH A GAP OF 2 HOURS (FROM THE PREVIOUS FEEDING START TIME). I CONSULTED A LACTATION DOCTOR WHERE SHE IS TELLING ME TO MAKE HER FEED FOR 30 MINS WHICH SHE IS NOT READY TO TAKE SO WHAT SHOULD I DO? AND FOR LATCHING I HAVE BIG AREOLA AREA WHICH SHE IS NOT TAKING INSIDE SO SHE DRINKS WITH NIPPLE AND LITTLE AREOLA OF DOWN SIDE. So what can be done for latching. Please suggest for all 3 queries