Suggest Solution For Pre-ejaculation Fluid Like Discharge After Bowel Movement?

iam 40 years old. For the last one year, iam noticing that a small stain on my under wear which appears to be pre ejaculate fluid - the clear egg white kind of substance. This usually seems to come out some time after I clear my bowels . I have problem with my bowel movement in the sense that I usually have to go to the loo twice or even thrice a day due to some kind of constipation or inability to pass the full stool at one go - I also have lot of gases in my stomach. Perhaps I exert too much to pass motion and maybe because of this , the preejaculate comes out . But this leaves my underwar dirty. How do I prevent this from happening. What medicines can I take