Everything i eat/drink makes my chest become tight and i notice my heart rate more. could this be gas, a hiatal hernia or something else?

Yes: Get evaluated keep track of the symptoms timing, duration etc and take your notes to your next appointment.

Maybe spasms: The first thing you must check is that your heart is ok. At 22 years of age, it almost certainly is. Esophageal spasms could easily be a cause of your symptoms, and this can be determined with an test called manometry, which involves a tube in your nose for 15' or so. Referral to a GI doctor should be considered.