everyday i’m getting burning sensation in my stomach at around 4.30/5pm.

for context, i’m getting burning sensation in my stomach every single day at around 4.30/5 in the evening. this sometimes keeps on going till about bed time. i have lunch around 12.30-1 and then i usually workout after lunch. after that i have a shower and by this time, burning sensation starts and even if i eat something to suppress this it won’t go away and i feel extremely uncomfortable. has anyone else had this problem? and if so what did you do to stop it

ps: last two days i’ve been taking gaviscon right around this time but it still won’t stop it from happening. the only relief i get from having gaviscon is, burning sensation will go away fairly quickly. but im not sure if its okay to keep drinking gaviscon everyday. at any rate i need to heal this