I'm 26 yrs old I'm on the depo shot and I have been on my period for a month and a half. Is this normal?

Yes this is normal. Did you just start? It is common to have irregular, unpredictable, longer and/or heavier bleeding when you first start taking depo-Provera. Sometimes it can extend into the 2nd and possibly even the third shot. Eventually it will taper off. Many women will eventually stop having a period altogether. However, some women will continue to have irregular and unpredictable bleeding the entire time they are on Depo. Good luck!