I had been on depo for almost two years and stopped about 5-6 months ago. I hadn't had a period since I had been on it. Today I woke up with bleeding, stomach cramps and back ache, ( that has occurred the past few days) and slight constipation. I'm just wondering if I should be worried about being pregnant (we did use protection, but one night we had 4 break) or if this is normal with depo. Any help would be greatly appreciated. Thanks.