Hi and I'm really sorry to hear that about your micturation problem...
Welcome to HCM and I'm here to help you out.
I being a surgeon, we encounter so many such cases..
I read your question completely and have understood it well...
Will analyze your history, point by point...
1. You say you pass flatus (fart) at the end of urination.
Well, if you pass flatus through
rectum then it is absolutely normal.
No need to worry about that..
There's a problem called,
pneumaturia where one feels passing of flatus from
Urethra through urine.
This occurs in fistula.
So if you are sure that, the flatus is through normal orifice then it's fine..
2. Slow urine is definitely a concern..
And you have to get evaluated for the same..
Please get your urine flow rate done. This will give clear picture of the problem.
After this, we can plan how to go about.
3. Most common causes for such slow rate are..
A. Stricture Urethra
B.
Prostate related problems in males
C. Meatal stenosis
D. Urethral stones etc..
So please go about how I've explained..
Hope this helps you... In case you need any further help, please let me know.
Take care and God bless you..