Wondering if I could be pregnant

Sooo...I've been experiencing some odd pains within my body like nausea and maybe some diarrhea or more pooping and more peeing without drinking something for a while I'm not sure what's going on all I know is that I've been feeling funny for a while now and it's mostly in my stomach and I've never had these pains before oh and also some cramps which I don't normally have unless I'm on my period, but I have heard that ever woman is different when pregnant and you don't always have morning sickness as a sign at first but I know you can be nauseous I'm just not sure and I'm not wanting to waste money on a test if I'm not pregnant