My period is currently 7 days late. On March 23rd I almost lost my virginity all the way but chickened out last minute whenever he tried putting his penis inside of me. He ended up playing with my clitoris and giving me oral sex. My period came on March 29th, lighter than usual. My second period came on April 15th which was also kinda light and  (9 days early). My third period was scheduled to come May 7 and it still hasn't came. No penetration or cum happened. I've taken over 13 pregnancy tests and they've all said negative. I'm scared and worried please someone help me.