Dear Sir / Madam, today morning I waked up after sleeping about 9 hours (without going to the bathroom and drinking before the sleep). After going to the bathroom I felt pretty acute pain in my lower abdominal. It became milder during the day, still preserving though and appearing sometimes with more strength while changing position (siting, or standing). It kind of feels like muscle pain and earlier could be felt also while touching the muscles near the penis. Now it is way milder, but didn't go. Can this be a result of muscle stretch or something like this?

thank you very much,