I am unsure if i could be pregnant

Patient: I had the nexplanon/implanon form of birth control and since i have taken it out I have missed two periods. Me and my husband have had unprotected sex recently and i have taken 4-5 pregnancy tests and they have all came back negative. So in turn I am getting worried about what is going on with my body.

Symptoms: Bloating, mood swings, fatigue, nausea