I think i might have BPD help.

Most times I am usually happy But once in a while like once everyday which usually last for like an hour I get really sad,frustrated, worthless,feeling life has no meaning,after one hour has passed I become my happy self again. It happens mostly after having a sober conversation with someone at night, Maybe the person tells me What he or she did that makes him or her So happy,then I start thinking of how unhappy i am even though I know I am not unhappy I just feel sad for about an hour,very gloomy and feel like ending my life at that point,But I don't ever take any step to take my own life,I just wait for dat hour to pass den I become normal and happy again.
At other times I am usually very happy,I start feeling like a genius, like someone who is about to discover something ground breaking,like an hero,So happy and elated,feeling unstoppable. Also for about an hour or less,this happens everyday an hour for each opposite feelings.
Am I bpd? What can I do about it?

Only a doctor can diagnose your problem's, maybe that may be a good place to start.
Best Wishes

Sorry to hear you are facing challenges.
A doctor could give you a diagnosis, but it is obvious you are having mood swings.
One thing that I have read about on this site is triggers, things that set you off. I am not sure if what the person tells you sets you off or it is the worrying afterward.
You might find this article helpful.
Breaking the Cycle of Shame and Self-Destructive Behavior | Psych Central
or
Understanding the Cycle of Guilt | World of Psychology
There are many forums
http://forums.psychcentral.com
there are many options there.

To me that does not sound like BPD. that sounds more like rapid mood swings form bi polar. like these other two people have said only a doc can diagnose a mood or personality disorder.
BPD has many characteristics that you would have to fall under. a few are frequent attempts at suicide, self harming behavior, risky behavior, intense extreme emotions, all or nothing thinking and the list goes on. BPD is very hard to explain I still have trouble explaining to people what it is when they ask. because its not something simple like oh I have a chemical imbalance in my brain.
well I hope you find answer on to what you have been experiencing good luck to you.

Thanks y'all