Any Tips

Hope
Ok i did 2 pregnancy test one at my house and one at my boyfrirend tye one i did at my house came out saying pregnant and the one i did at his house came out not pregnet i took the one i took at my house to show my boyfriend he was happy but when i took the other one to show him again and this happen!!!! I dont know whats going on but i have no bleeding what do i do?