You might face exhaustion, (which isn't surprising, as your body is trying to tell you to slow down) and you shouldn't ignore it.If you do, you'll only exacerbate any anxiety, frustration, and resentment your hormones might be causing you to feel.Talk to your doctor if you have any questions about these particular patterns, because you need to know when you're most fertile.
Put it into perspective, though, and it doesn't sound so bad — there are countless women around the world who don't even have the option of spending money on their periods because menstrual products simply aren't available to them.
PMS is no joke — and don't let anyone tell you otherwise.
Even if your monthly period occurs within the 21-35 day frame, it's still not considered regular if the number of days that pass between periods doesn't stay steady.
For example, if your cycle is 24 days one month, 30 days the next month, and 26 days on the third month — you're not technically having regular periods.
This means if you have a shorter cycle, and thus start ovulating sooner after your period than women with a longer cycle, you could get pregnant by having sex on the last day of your period. You should also be aware of the differences between mid-cycle or ovulatory bleeding, and menstrual bleeding.