i feel more bloated like when i am having my period but its nowhere near that time

i have been really tired & sleepy lately ive had my period but it was late and didnt last as long as normal i have notice along with my boyfriend i have been more moody than normal & my breast are larger than they use to be what could be going on we have sex on a regularly basis neither use protection just the pull out method i feel more bloated like when i am having my period but its nowhere near that time could i be pregnant or what any help & advice would be greatly appreciated thank you