Ay nak, those symptoms sound sobrang uncomfortable, nausea, dizziness, fatigue, headache, at body aches together like that really need a doctor's check, lalo na kung tumatagal na. Please go see your OB or your regular doctor soon, or if you're feeling really bad ngayon, better go to the nearest clinic or ER na. Could be maraming things, dehydration, infection, hormones, or something else, pero hindi ko matutukoy dito. A few of us mums had similar complaints before, tapos nag-turn out we needed actual treatment, so better safe talaga. Take care of yourself, nak, you deserve to feel better!