so i’ve been on birth control for a year, and i have never had an irregular period since. i always get it on the morning of the day i expect it, and it always lasts 4 days. i got my period 6 days early, before i was done taking my pills that week. i continued to take them, and i skipped the off week and just started my new pack because i was going on vacation and i wanted it to go away. it has now been three weeks since i’ve had it. for the last week it hasn’t been heavy, but its been brown blood with lots of clots. i haven’t missed any pills previously, so its nothing i did wrong with my birth control. should i be concerned?