dizzy, nauseated, right leg achy

I am a 30 yr old female who for the past couple months have been experiencing dizziness, as if I'm off balance and and when standing upright feel as though I am on moving ground, I also feel nauseated without ever actually getting sick or severe enough to get ill. At night my right leg and the arch of my foot feel as though I ran 10 miles and is achy and unconmfortable. Any ideas. I weigh 111 lbs, workout steadily, have 2 kids and am otherwise healthy...

hi im 37 years old and myself and my husband have only been trying to conceive for 2 and half weeks, my last period was 28th April and my ovulation day was yesterday but i feel pregnant, I know its sounds crazy but i have mild nausea swelled tummy aches n pains in my pelvic area and my lower back, I am very,very tired and i am urinating at least twice a night, could I be pregnant already? I have 2 children already which I conceived no problem my eldest son is 20 and my youngest is 7, can you help me?