 [ Symptoms ] is it ok to cut a pill in half i have 20 mg pills [ Disease ] is it behaving like a normal period or just spotting how long is it lasting for i am not sure why your back would hurt and am not trying to get your hopes up here but spotting happens around implantation too your body can also do strange things around ovulation if it turns out to actually be your period notice what you have been eating significant changes in diet or weight can impact it also significant increases in stress or change in exercise habits if it lasts longer than your normal period or other strange symptoms arise i would at least call the nurse practitioner at your gyno is office and ask and in another 6 days take a pregnancy test just to know