Af due 14 day ago but negative test

So my AF was due 14 days ago but still not showed up. I came off by he depo beginning of may this year. I've been having bleeds while on the depo before the next one is due. My Af returned straight away. I had June July and Aug with on time regular Af. September came and nothing... I've been haveing a few symptoms of pregnancy. Sore an itchy boobs /nipples. Bloating. Metallic tate in mouth. Nausea. Heightened smells and off certain foods. Have taken test and to me they are negative. A friend says she can see a faint line but I really can't. Could I be pregnant or is this my body playing tricks on me. Has anyone else randomly missed Afs few month after last injection and had af in between. Thanks in advance x