Pls advice. had unprotected sex using withdrawal method on 1st jan. my period came that nite. now having a little spotting. did a hpt, neg. preg?

Likely not: You don't mention having unprotected sex at other times in the last month. However you are most fertile 2 weeks before the period begins, so if your cycles are regular and the jan 1 period came at the right time it's unlikely you are pregnant from sex on jan 1.

It's not likely: To be pregnancy, the time frame is off. People can have bleeding between cycles. There is more info needed. Like your age, if over 35 w bleeding between cycles, may need to be evaluated. It could be infection of the cervix, irregular ovulation...It sounds like u r concerned but if pregnant there should be a positive pregnancy test. It's a good opportunity to go in and get on the pill if wanted.