Hi I am so worried I might be pregnant. I had sex a few weeks ago.It lasted only a few seconds and he didn't ejaculated. Yes he wasn't wearing a condom. I have no symptoms only I just don't know when my period is due or if I'm late. I also took a home pregnancy test and it was negative.. Please tell me I'm not :(

Impossible to comment with such scant information.

Could you be pregnant ? YES

There is sperm in early fluids, so all it takes in going in ONE TIME.
How long he is in and if he finishes does not matter.
If he finishes , it just makes it easier to be pregnant.

Also condoms have a 3 to 10 percent failure rate, so even a condom will not always stop pregnancy.

There are normally no signs of pregnancy till you miss your period.

You should be tracking your period, as to start and stop dates and know your cycle,

But you need to figure about when it should be. You can not take a pregnancy test this early.

You need to wait about 14 days after you are late, and then do a test with the first urine of the day as soon as you wake up