Depo injection

I have been on the depo injection for over two years on and off, bleeding so irregularly but so consistently which I found odd! Some days heavily other days just so light. In January I came of the depo injection trying for a baby however nothing seems to happen. Sometimes my periods won’t come for six weeks others I will bleed all the time it’s so confusing to log on these apps... I have discharge all the time, white discharge usually tends to be slightly thick but not overly but other times it’s just normal. Never smells off just usual discharge. Is this normal? Should I be worried that I’m not pregnant? Any tips to help me out? Please if anybody could help me out.