Penile plassidness can be understood by a heavy mansturbation followed by again an oral sex. You have overburdened your penis. Give it a little rest for few days and do not worry, it will be as normal and vigorous as before. The burning micturition not getting over even after 2 days is indicative of infection; probably through oral sex, if she had it. Whatever may be the source, your immediate step should be to get your urine examined microscopically from the laboratory. If it shows infection as evident by pus cells and/or red cells, then get the culture and sensitivity test done to find out which bacteria have caused the infection and which antibiotics will be effective against them. Of course, please do all these things only with the advice of your urologist or venerologist. Till you are cured of the infection, please refrain from any type of sex lest you spread the infection. When you resume the sexual activity again, only after doctor s green signal, do it only with proper protection like condom, and descrimately.