I'm exactly like you-I just found your post.I was driving my doctors crazy because I didn't have any m/s or sore bbs(that was my biggest concern,when I was PG first time with my son they got 2 sizes bigger and were very sore!)In fact,I was 99% sure that IVF didn't work this time because I didn't have any symptoms.Imagine my 
when first we got BFP and then saw 3 sacs on u/s.I was shocked that I'm not spending ALL my time with my head down the toilet.The only thing is-I have no appetite or cravings at all,no food appealing to me,but I make myself to eat.But it was a surprise when I threw up last week in the morning(I think that was nerves before doctors appt.) and for the past week I felt nauseous in the afternoon.I thought the same thing-it's kinda too late for this to start now.
So,probably,it's ok.We have to relax and try to enjoy
