Pain during sex since I started BC?

Alex

I not sure if it’s just me but I’ve been on the depo shot for almost 4 years. About a year into taking it I started having pain during and after sex for up to 40 minutes. I’m talking about super bad cramps, my heart racing for 20-30 minutes afterwards, nausea, etc. and recently I bleed every time I have sex. Am I the only one have these problems? I’ve mentioned it to my gynecologist but she just keep shrugging it off.. what should I do?