What type of seizure did i have and will i have more

I have had 2 seizures in my life and just had a few questions. Both of these seizures occured from the use of drugs ( benadryl and cocaine). I have stayed away from both of these drugs ever since. The benydral caused my first seizure about 3 months ago, and the cocaine caused my second one yesterday. My first one was far worst than my second, i do not remember anything at all. My friend said i started to stare off and not reply to him then slowly layed on his bed and started shaking my whole body. I would start shaking then stop, then start, then stop again. He said i then sat up and threw up. i was also very confused and couldnt talk. This all lasted about 3-4 minutes. After that he said i could understand and talk to people, but had a hard time walking. There is only certaint moments i can remember for the next 12 hours after that(but im pretty sure that was caused by how much alergy medicine i took). It wasnt until the next day that i was 100% back to normal. The second one was far less dramatic. In this case i still dont remember anything while it occured, just right before and after. i was with a different friend in his room and we were watching a movie. I remember looking away from the screen at his dresser and then BOOM, nothing after that. The next thing i know im sitting on his bed and hes freaking out asking me if im ok over and over again. It was like waking up from a nap and someone is all up in your face asking you if your alright, he scared the hell outta me when i woke up because he was so close to me. I then looked around and acted like nothing even happened.I didnt even realize i had a seizure until he told me. At first i didnt believe him but then i tried to remember what happened right before he was standing over me and i couldnt. It was strange because when i did come back everything seemed to be normal. He said I slowly fell to the ground and started shaking a little bit, also my eyes were rolled back. He said he picked me up onto his bed and i just layed there making all kinds of noises with my mouth (while still lightly twitching every body part). That lasted for about 2 minutes then i woke up, but not fully. He said i couldnt talk right and was making really strange facial expressions, which lasted another good 2 minutes. He then told me after i regained consciousness he could tell i was ok because i was actting like nothing even happened, and i was answering all the questions he was asking me, i remember the exact moment i came back. I was just a little confused about why he was freaking out and why he kept asking if i was alright. I remember the exact moment i went out and came back just nothing in between. So after all that heres my questions. What type of seizures did i have (im pretty sure they were grand mal). Also since i know what triggered my seizures, is there a greater chance, or even a possibility of me having another one without any sort of trigger? And finally, could these seizures have caused permanent damage to my brain(I feel 100% fine).