I went to meet my girlfriend on the 16th of this month.We got intimate at night but I left my boxers and tracks on and she left her underwears and lowers on.I inserted my hands into her lowers and fingered her vagina.But I had nothing in my hand(neither precum nor ejaculative).I had precum but I did not ejaculate.She says she felt my penis near to her vagina from above our clothes.Normally she gets her periods on the 13th or 14th of the month.Last month she got her periods on the 18th.But she has not got her periods till now so we both are very worried..Is there any chance of getting pregnant due to this?please help...