How's the spotting babyo?? It is normal to have a little breakthrough bleeding when af should be due. Also the fact that its brown suggests old blood so possibly from implantation?? I was on 400 prog too hun. I wish I could say there was something spectacular I did that made bean stick, but it was a culmination of little things, and just meant to be at that time. I was on second cycle clomid, taking evening primrose oil until ov, drinking raspberry leaf tea up till 5dpo, prog from 10dpo. Also recommended to me by my gp, who had also suffered fertility probs, was Wellwoman Vitabiotics. I caught six weeks after taking that and it stuck. I don't know if one or all of these things helped? A month before I caught too I had a procedure done to inflate and wash out my uterus to check its structure, is been told it just helped clear any old stuff and ensure the pathways clear.
I think the most vital thing though is to stay relaxed an stress free. Easier said than done I know. Just trust that if its meant to happen for you this time, then it will.
Be thinking of you and willing your little bean to hang in there hun xx stay positive xx