Pregancy help I'm Im only 18 nd I'm s ares?

I'm only 18 thought I was prego on the 31 of dec Jan 14 me nd my man had with no protection he said he cAme in me nd I pee every hour I get heAd aches before this guy I thout I was prego by. Nother guy now my periods 9 days late I took A test it cMe out negAtive I just had on the 14'of Jan is it to eArly to take. Test nd should I stop smoking till I find out ple I need help nd I'm scared ple email me At Tiffanybaker44@yahoo.com