Could i be pregnant again?

About 5 weeks ago i found out that i was pregnant, then the weekend of my wedding i had a miscarriage. I was about 6 weeks along its been hard on me but i try to think positive. My husband and i started having sex again and we dont use protection.I think that i might be pregnant again but i took a pregnancy test and it was negative but i feel pregnant my breasts are sore, im tired all the time, i feel nauseas frequently during the day, im urinating more than usually,and my sense of smell is more so and yesterday i was spotting. so i dont know if im pregnant again and the pregnancy test couldnt detect the hormones? or could i be starting my period soon? or if im going crazy? Maybe im just thinking i am because i still wanna be. i have never had a miscarriage and this would have been my first child. i mean im pretty knowelgeable when it comes to my body but this is just confusing. so i need some help am i pregnant again or am i losing it?