Any tips or advice?

I woke up last night to sharp stabbing pains in my lower abdomen. I immediately freaked out and was gunna go to the hospital and then I realized I haven't gone to the bathroom in a couple days and I could tell that's what It was. All day yesterday I felt like I had to but couldn't. So I got up sat on the toilet a while and nothing. Any tips?? I live in a super small town and in Canada so most over the counter stuff is hard for me to find. I'll drink tons of water today with some benefibre and eat bunch of fruit to see if that helps. But any tips would be appreciated!!