Do I have a virus? I accepted a link and went dark.

Do I have a virus?

I have accepted a link from a friend inviting me to download whatssap with video chat.

10 min after that my phone went black, didnt turn off, just black.

I removed the battery several times, tried every button, but nothing.

It doesnt even registe in the computer when I plug it in.

over a day after it came back; just like that. It worked fine for an hour and went dark again.

Yesterday, I had it for 2 hours. I downloaded antivirus and they say everything is perfect. but it went dark again.

It hasn't fallen or been in contact with water. I am only using 35% of its current memory. I have it for a year and this is the first time I have any kind of problem with it.

Today, the phone is normal again and has worked fine for 6 hours so far.

Do you know if I have a virus in my system? Could anyone have gained access to my phone?

Should I flash it?

Do you know what this might be?