Advise...

Ok so i had VSG in August because i was over weight and want to be healthier... long story short i was irrrgular and after having los 100lbs i have been tracking my mensus to see if it was infact because of my weight well along with that i have learned when i ovulate... well long story short i have been regular for 5 months now and on valentines day we had sex and well...it happend... and then yesterday it happened again... i guess my question is could i have gotten pregnant from V-day? Will i have a period on the 2nd ? Like do you have your first period ? and then start missing them ? I am having light cramps and am not due for my mensus until March 2nd? Please advise....