Ttc-help

averyah
Me (19) and my bf (21) have been TTC for a few months now but haven't been so lucky. We have got nothing but bfn. :/ My period ended today after being on it since Feb 22nd. I don't have a thermometer so I can't check my bbt. I need to know what days and how often me and my bf should have sex to make sure we conceive this month.. Any suggestions??