just wanna see what others think

okay im a big woman and ive not been on my pill for good 2 months was due on over 2 week ago but my periods have never been regular anyway sexually active often but im feeling sick everyday same time for the last 2 and half weeks and when i eat a certain food the feeling goes away for a few hours but ccertain smells just start the sickness back up im not eating as im never hungry but i force my self to eat im peeing alot more but think i may have water infection(waiting on doctors) ive been through pregnacy before and i didnt feel like this at all so im just confused

i havnt taken a test because i dont think i could be pregnant but ive read that recent change in excercise ive started gym this week could start sickness please help