civic si 2001 hardcore electric problem

hi, im new to this site i really need help fast! So my civic si 2001 that i just got work fine until tonight, i was driving with my friend and notice my lights sometimes just flash but nothing else happende. then, suddenly, everything started to flash in my car!! My radio kept going on and off, my speedometer and dash turned on and off, my car became hunted! when i was in idle, my car accelerated alone( i have a manual car at least) and when i turned it off, tried to turn it back on and it didn't work, when i came back 10 minutes later, it turned back up like normal! i dont know what the problem can be, please help me( i will post videos of my problem when it happens again thank you in advence 😊