What Causes Headache And Frequent Urination After Taking Minocycline Tablets?

i recently just started to try a new acne medication that my doctor has perscribed to me its called minocyclne and ever since i started i have been getting awefull headaches having to urinate more frequently and the worst stomach cramping and gas. also i am 5 days late on my period if you have any clue as to what could be the problem please let me know thankyou