So I actually wasnt thinking I was pregnant until my family kept joking that I am because of my sudden food cravings and mood swings, now Im afraid I may be imagining the rest of the symptoms

I know with my last two pregnancy I did the same but the father at the time didnt want children so he kept saying it was in my head and half of me is saying i just think its in my head because of the past. Im really in a battle with myself. Here are the symptoms that I think are real mood swings, food craving, breast tender (actually they feel like their the muscle are being pulled and their getting fuller) fatigue, and im starting some small heart burn. Im now checking my temp regularly and its been so far between 98.4-99 when Im normaly 97. my weight dont seem to change so much but I do know its not going down anymore its trying to go up but with how much Im eating I understand that. My mom said I look pregnant too but if I am Im like 3-4 weeks only so Im afraid all this symptoms are just my imagination now, I have taken test but they came out neg. and honestly I dont want to see my doc until I either get a pos or a new doc because they are right treating me like a some sort of baby machine and dont want me to have another.... Im completly cluess when would be a good time to take a test, oh yeah I was on the depo and stop but I dont my period schedule now so Ive been trying to guess when its coming or if it will since each person is diffrent. But its because i was on the depo I think Im imaginationing all the signs... So my question is (finally) is even possible that I am pregnant? Or is it really in my head?
MommyMiddy