How Can nausea Along With Frequent Urination Be Treated?

hi, i am 26 years old, i have had undergone tubal ligation for over 7 years now yet i don t know of what type of process the ligation was but i am experiencing nausea in the morning til afternoon the day after my partner and i made love. frequent urination than the usual, i am now hating the smell of fried garlic and fried chicken which has been a favorite of mine. although my breasts are not swollen, its in a light pain and my pelvic as well. i am not sure whether i should think of pregnancy or not because of the said process long time a go but i have read articles about it that it is likely possible and feed backs coming from women who have had the same experience as mine. wish u could help. my period is irregular even when i did not have baby yet. i will be expecting me menstruation this week or the next. thank you..