Am I?

Kim

So I've been acting very different lately. I'm supposed to go to my gyno in two weeks for my depo shot, but I've been showing multiple signs of pregnancy. I've taken three test; first one peed too much, second one didn't pee enough and third was negative. Testing again tomorrow but according to my boyfriend, who has had two children already, he swears I'm pregnant. I'm peeing much more than probably ever, waking up super nauseous, headaches all throughout the day, always tired, nipples or boobs hurting, very light pink spotting two days ago, and my clit is very sensitive. Any ideas on what else it could be?