Just looking for opinions...?

I've been thinking that I may be pregnant. My last period was way off and I'm not sure if it was a period at all. I've been really tired all the time and my are swollen (they don't hurt tho). I've also had constipation for the past 3 days(which I've never had before) and have been so hungry but unable to eat because nothing and I mean NOTHING looks good. I've also been getting really bad hot flashes (too early for menopause, I'm 23). I have been a little stressed lately but it's nothing out of the norm for me. Have any of you ladies experienced these symptoms during your early pregnancy?