Am I really pregnant?

I've felt sick for a while now and when I don't eat it gets worse. I fill up on food pretty easy now, while before I could eat and eat until I felt sick. I use to get sick in the morning and my use to be sore but that has gone away. I still feel sick in the morning but no longer throw up. If I press on my stomach I automatically get the feeling I need to throw up but I just breathe and it goes away. I have head aches and back aches. I have had more discharge in the past couple weeks. I haven't had my period in about 5 months now and my stomach is getting larger and a little harder. It's tight around my pelvic area and sometimes when I stretch I get a catch in my lower stomach that makes me double over. I'm not sure what being pregnant fells like because I've never been, so help. What do you think these symptoms mean?