Talk to Gastroenterologist on Stomach Ptoblem

mjy 5 month say stomach ka issue hai achanak m regix alergi ki medicine kha kay laita tha to achanak mera mou khushq hona strt hua achank chkr aya or mra sir bhar ho gaya or usky agly din mjy chakr wgeyra anay strt ho gay kmzori bht zeyada ho gai usky bd say bdhzmi rhna gas kabz rhna or sir to hr tym bhari rhta heat bht niklti nend ni ati rat ko bechaini rhti pta ni ajeab sa hta kbi sir thk ho jta kbi phr bhari ho jata or heat bht niklti mjy koi btaye m kya kru any one solution?