depo shot

Redd

I gave birth to my 2nd child in December and I got the shot on January 11 a week later I got my period and ever since then I have been on my period April 13 I got my 2nd shot and I'm still on my doctor said it's normal but I think it's not I am not spotting this is a heavy period and it's causing me to be tired dizzy and mood swings has anyone else experienced this?