I am just browsing here and there when I suddenly started to sniffle and sniffle so thought heck I am coming down with a cold but no blood is pouring out of my nostril
This would be my 4th nosebleed this year and last year maybe had 5 - is there anything to worry about. If not what causes them.
I have read some reports saying it is high BP but every time I get checked - the nurses actually look at me like a freak - saying they have never saw/seen as good blood pressure reading as some people's naturally rise by going to see doctor/nurse.
I'm no doctor. But occasionally it can be connected to high blod pressure. Don't be tempted to blow your nose conne when the bleeding stops , pinch the midde of your nose try not to swallow any blood( make you nauseated.
I know I don't have white coat syndrome as you described, I do suffer with hypertension so know the signs, sometimes I ignore them, get nose bleeds. If you're worried about them see your doctor.
When you are sure the bleeding has stopped smear some petroleum jelly inside the nostril - a dry nose lining can cause nose bleeds, and in any case it will protect and aid healing.
Do this twice a day for a few days, see if it helps
As a teenager I used to get nosebleeds quite regularly. When I did my National Service I had the offending blood vessel/s in my nose cauterised which really helped stopped the nosebleeds. I still get occasional bleeding but it happens very infrequently.
To understand the cauterising process see the following NHS site: