Leona - welcome to MM
I am no expert but some upheaval is our hormones at various stages through our reproductive life can occur. Some discharge at ovulation is also not unusual.
It is not unusual for the ovaries to start to fail in our 30s - this happened to me - and if your oestrogen levels drop and your FHS level goes up then you will need some HRT to replace the oestrogen and protect your heart and bones for the long term. Having some tests and getting this scan may give some reassurance and if you do find the periods getting further apart, heavier or much lighter or you start to get flushes, then further blood tests to check your hormone levels might be advisable.
If premature menopause is in your family then it's worth mentioning this - the doctors will often say it isn't genetic but many of us know otherwise.
I wouldn't worry at this stage - try to get on with life - just get clued up about what to expect, make sure you have a good diet and exercise regularly, keep your weight within the normal range and generally look after yourself. Good luck Dg x