Thanks for your query.Based on the facts that you have posted it appears that you have increased frequency of urination and dysuria .You have not mentioned your age in your query.
Your symptoms are most likely to be to enlarged prostate
Please consult qualified Urologist
for clinical and digital rectal examination
and get ultrasound
scanning done to confirm the diagnosis.
The drugs Nexum and Tums that you are taking belong to antacids group of drugs and has no role to play to enlarge the prostate .
Enlarged prostate is a ageing process and affects most men after the age of 60 years.