Iv been trying to get pregnant the last 5months and still hasnt happened but ever since my boyfriend has start cuming inside me my periods have been very irregular and normally there right on time for exactly five dys but iv been gettin them for one day a month to eight days the next month and not knowing when there gonna come my breasts are very sore and my nipples are after gettin larger its weird and i don have a clue whats going on with my body... Did this ever happen anybody before and do they know what it is all over?