pains in the stomache , plus cramping and diarrhea

i get constant stomache pains all the time , then sometimes i get cramps and diarrhea at the same time , i don't know what it is , im 17 years old

for the past 2 weeks i've had the same problem. constant cramping, although the urge to BM has decreased (still mushy in texture though). I've had blood and urine tests (neg pregnancy test) and an ultrasound (negative). i have no health insurance so seeing all these doctors is costing a bundle. any idea what it could be? another doctor gave me dicyclomine (usually given for IBS) for the cramping but it didn't help.
thank you


*****edited by moderator**

Hi, last probably 6 months I suffer from irregularity in my bowels. I have seen doctors, had tests all come back fine, seen alternative medicine. its so frustrating and affects my quality of life. For few days I am really good, then its like my body builds up everything I have eaten and I get diarreah, then its back to normal for a few more days, its so annoying. I take inner health plus doesnt seem to be helping though? May have IBS, but i cut wheat out of diet as that seems to irritate it more. But never happens when i eat something specific, its just really random. Do i need to increase my fiber intake? Can anyone help!