Good Afternoon. I've Been Paying Attention To What I Eat,

Good afternoon. I've been paying attention to what I eat, and have been drinking plenty of water, but I've noticed lately that when I feel full after a meal, I feel full up near the sternum area instead of down in my belly. Additionally, I've been feeling rather gaseous lately, but I don't think it's been food related. I don't have health insurance because I just lost my job, but I was wondering if you might be able to determine what the problem might be. Thank you.