Could i be pregnant again?

ok so back in may i lost my baby thats why i say again..Ok so here are some of my symptoms..i had a cold last week just a sore throat and runny nose but it has been gone for a week now..i threw up breakfast 2 times but i thought it was coming from the cold..Then it happened again yesterday i got a major headache and i couldnt move without throwin up i got really dizzy and had to leave work early..about 3 the nausea and the headache went away after some tylonel....then i ate a really good supper last night about 9 but for some reason i woke up at 7 starving like i havent ate in days (i only did this while i was pregnant) yes i have had unprotected but me and my husband are trying to concieve again and not to mention my period is about 7 days late now..i was wondering if my cold that i had last week affect my period being off i havent done anything abnormal lately to make it late and i havent been stressed either i have actually been really happy the last couple of weeks i took a test yesterday but it was in the middle of the day about 4 after i was done feeling sick and it was negative should i wait and test again or do you think these are signs of my period oh and not to mention my hurt and they are really red??? if you believe i should test agian how long should i wait before i do it again?? I also used the clear blue easy read test if that matters??