Could Mood Swings, Tender Breasts And Bleeding After Sex Be Symptoms Of Pregnancy?

Hi I'm wondering if u could help me I think I mite be pregnant,first of all iv been on the two months injection since the age of 12 iv been on and off it the last couple of years I'm 19 now,my last depo I had was in december last year my next one was due febuary of this year I never went for it and have been off it since,iv been dating my boyfriend for 7 months and haenever used protection and he would cum in me everytime we have sex,this month I started my period too early and it only lasted for 5 days which has never happened to me before I would normally start on the 8th around there and bleed for 7 days,about a week after that I wiped and there was blood clean blood me and my boyfriend had sex the night before,a few days later I noticed cramping which was very weird because what was the cramping for it was there the whole night the next night I cramped again and only for a short while I also noticed my urine was lighter then usual and I haven't been drinking a lot of water I'm also feeling very emotional moody for no reason and tired,yesterday my breasts started feeling tender and I also noticed distarge on my panties,I took three home pregancy tests already all show negative please help,much appriciated