Hello and welcome to HCM.
Thank you for your query.
Although most of your symptoms relate to a hormonal
problem and/or pregnancy
(during which there is a change in hormonal levels as well); the fact that you are frequently urinating does bring up doubt on the possibility of an infection as well.
I would first like to clear the pregnancy status. I hope you have conducted the pregnancy test at least 2 weeks after your last sexual intercourse or on or after the first day of a missed period with an early morning urine sample, which would yield the most accurate result. If not, please repeat it in this manner.
Next, I would request you to give your urine sample for analysis to the laboratory, which will provide vital information on the presence of absence of an infection.
Once both pregnancy and an infection is ruled out, a check on your hormonal levels, and only after a physical examination by a doctor, if he/she suggests, undergoing screening for sexually transmitted infections would also help.
In the meantime, please consume plenty of water an abstain from all forms of sexual contact till your doctor deems it safe.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://doctor.healthcaremagic.com/doctors/dr-shoaib-khan/64581 . I would gladly help you.