Replenishment symptoms and conditions

I have taken 4 doses of Fosomax-1x a week - and have noticed weight gain, nausea and lethargy. After the first three doses noticed a mild headache, which I blamed on my sinuses. After this last dose ( taken 6 days ago), I have had an excruciating headache, and facial pain. I have a constant burning feeling in my stomach. I will not take another dose. I saw that someone had previously mentioned taking Bone Up, and had good results. Has anyone else tried this? As a breast cancer survivor with borderline osteoporosis I am looking for a good alternative.