You are most likely going through peri-menopause. I had the same symptoms as you at that age. Two periods a month.. bled 5 days it would stop and I'd get another one for 5 or 6 days a few days later.
I started skipping periods at 46 and by the time I reached 47 to 48 I had one more period and then no more. Take care of yourself, get another opinion from another gyn just in case you are not in peri-menopause. If your mom had menopause in her 40's you are more likely to have it around that age too. Good luck.
49 is absolutely not too young to be peri/premenopausal or menopausal. Everyone is different and thus we age differently. My aunt didnt hit the "change" until she was 60. I went peri when I was about 30. That was my first symptom year. It is hard for me to tell though because I was one of those girls who NEVER had a normal period week or flow rate. OMG so much was off about my reproductive system when I was young. (a rant for another time)
I still dont have normal periods. Like many I have them too frequently, then I will skip two and have one, then skip one and have frenetic flow rates too.
I would find another Gyn. But thats just me
Best of luck girl
You could be pre-menopausal. 49 is definitely not too young.