Symptoms

I’ve been on the depo shot for 4 years now but every once in a while I get stressed I might be pregnant just because of the symptoms. I know I’m probably not bc I use condoms (most of the time..) and am on depo and haven’t had a period since my very first shot. I wonder if I even ovulate. But uh I hate that basically all the signs of early pregnancy are the same as ovulation and the same as period symptoms. Like bloating appetite sore breasts are all symptoms.