Why am I feeling like this?

Ok so heres the deal, im 19 years old and I am in need of some advice. (this question is for girls only).

So I have a lil problem.

In December,it was like close to mid December, my boyfriend and I were doing “things”. We have never had sex but on this particualy night,we were standing against the wall and well…uh…I kinda had my pants pulled down a lil and he uhm…pulled himself out of his pants and rubbed himself against me. He didnt go inside me or anything and he didnt um…ejaculate. But last Thursday around like 6pm,my stomache started to huet like bad,it only lasted maybe 2 hours or a little less. The the next day on Friday, it hurt bad again around 3pm for a litte less than 2 hours. Ever since then,I’ve felt kinda wierd. Like,not sick but,for the past couple weeks I’ve felt kinda light-headed and a little dizzy time to time. Today when I go to school this morning,I felt like I was going to get sick but my stomache didnt hurt or anything. I did get my period in December after that night happened,but it was about 5 days late. It would usually start on the 18th give or take a day but like I said in Dec. it was about 5 days late,and last month in January,it was again,about 4 days late.I still got my period both months,but I was kinda freaking out.I have been feeling somewhat restless or tired/kinda weak the past few days. What im asking is do you think I could be pregnant? I mean,I havent felt any other symptoms of it,I havent thrown up and I DID get my periods the past two months but they were late,does that mean anything?or could it be the seasons/wheather changing along with the new year starting?(if thats even possible). I could just be really paranoid and over-racting but I would like some second opinions.

Thanks(: