Yes it is possible! Get tested..and if so..Congrats!!
doesnt sound likely if you havent had sex in 3-4 months now. If your period doesnt come in the next few days you could take a test for some peice of mind. If negitive and period still doesnt come you should see your OB. Best of luck!
It is very rare for women to be pregnant after having 2 cycles. However, there are some women out there who are pregnant and continue to have their period. If you are a week late, a pregnancy test should be accurate by now..esp since you havent had intercourse since January....and if you were pregnant and still getting periods, you would be atleast 8-10 weeks now...so a pregnancy test will put your mind at ease!