Sperm meets egg vs. BD?

So DH and I have TTC for #1 for almost 6 months and I'm 36 (DH is 33). My HSG showed clear tubes, and both of our bloodwork is normal. During ovulation days, we've tried both (Sperm Meets Egg Plan) SMEP plan using Softcups with and without having sex (i.e. - he goes right in softcup and I insert), and BDing every other day. I've also used Pre-Seed. Unfortunately none of these have worked. Are there any fans of either the SMEP or just BDing? Has anyone with trouble conceiving had success? Are there any tips/tricks/hints anyone can offer? 

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