Something New

My boyfriend and I have been together for almost two years and when my period would come he was the only one reaching his climax .. I would have to sit in hot water or lie and say I wasn't on for us to have sex because he was so freaked out about it. Now that I'm on my period this time we have been having sex the whole time everywhere and we are also trying to get pregnant.. is it possible to get pregnant while on your period? This period is irregular by the way not as much and it's starting to led up after only 4 days when it usual last for a week and 3 days ..