is it too late to lose weight?

kinda silly question, since deep down i know the answer. but i'll be more specific. before the BFP i put on about 10 pounds. i over ate the easter candy, my fault, thinking i could work it off over a few months. then the BFP. so im not adding to my workout plan, and im not dieting. with previous pregnancies i got hit with the morning sickness and lost a few pounds (about 10) during the first trimester. but overall i am still lighter by 30 pounds then back then. so who here thinks after morning sickness sets in i can drop that 10 pounds? also, when the doc asks my prepregnancy weight do i say the weight i was for the last 5 months prior or do i have to add the easter weight? if i use my average then my "weight gain to date" is about 10-12 pounds. im so confused. i know, when you get pregnant weight goes out the window, but it is something i am aware of. i guess what i am thinking is if i can finish the trimester without adding more then i will start the second about where i should be, +10. but is that realistic and healthy? or is that easter bunny stuck to my butt for another 9 months?