I had my daughter in July. I got my first depo provera shot on August 27. 2 weeks later my ex came in me after I told him numerous times to pull out. I've had pregnancy symptoms kind of be nauseous, back aches, majorly constipated, and my stomach feels hard. I haven't gained weight I've lost about 5 pounds and I've been spotting rele dark brown an sometimes bright red with clots for about a month or more now could I be pregnant? I've taken 4 tests and they have all been negative.