gastrointestinal problems

Do any of you guys have GI problems? Because for the past couple of months I've had a lot of gas, constipation, and heartburn (when I haven't eaten enough/ate bad), and I'm not sure what to do. The gas almost feels like baby kicks, but I'm certain I'm not pregnant bc I've had my period consistently for the past 5 months and protected sex (pill & condom& pullout method)& no other symptoms. No weight gain, I've actually lost weight, no food aversions, or anything. every time I bring it up to h mom she just says it's my anxiety causing it and making it worse but I'm just getting worried bc it is getting worse. Any thoughts?