 [ Symptoms ] felt ripping or tearing in lower back when picking up something heavy what should i do [ Disease ] hi ok just think back did you masturbate before you was with your gf did you urinate after it if no then there could be a small problem but not yet but if yes your ok but does sound like she could have the flu coming on and not pregnancy if she was she would not know about till she miss is her next period but if she is getting stressed over this then she could still miss her period stress will do that best you both can do is stay calm and wait but for me i nom not think she is not from the day after reason she has not had her ovulation day yet which is around day 14 of her cycle day 1 is the first day of her period hope this helps you good luck