I started my period on 19 dec and it ended on 23 dec, my husband and I had unprotected sex that weekend and also again on new years eve and day. I have had back ache and period like cramps, which don't normally appear until 3 days before a period. nausea and feeling tired for last couple of days. I think its too early to test but do you think I could be pregnant?

Pregnancy could definatley be a possibility but it would be highly unusually for you to be having these symptoms so early on as it was only a couple of days ago rally so the likelihood is if you do conceive from this pregnancy it is only just preparing to latch onto the womb. The cramps you are experiences could be inplantation cramps, but the only thing you can do is wait and see if you miss a period