concieve

I'm hoping can help or point in the right direction. I had unprotected sex on the 1st January. On the 13th January I had bleeding that started out heavy and then got lighter and stopped in the 14th January. I had no cramps during this two day period. Now that it's ended I have cramps sometimes. I did a test on the start of the bleeding but got a negative (but when I thought about it all I got on the stick was blood and I didn't hold it there for 5 seconds like advised so I don't think I got any pee on it at all.)

Could this be a sign of pregnancy? I plan to take another test soon but unsure when...