I've been taking 2000mg metformin for PCOS for about 4 weeks now and I'm finding the side effects to be brutal. I read a lot of people are experiencing nausea which is the one thing I'm not, luckily. Extreme tiredness is one that's become a nightmare, even after a good night's sleep I feel like I'm.about to drop. I'm getting dizzy and experiencing lower abdomen pains, as well as bladder and bowel disturbances. I can hardly eat as I'm so bloated all the time and I feel like sometimes my breathing is pretty shallow, like I can't catch my breath. Is anyone else experiencing or have experienced such extreme side effects and will they pass with time? Thank you.