50% of fertile couples take longer than 3 cycles to conceive and so you should not consider it a problem.It can take even healthy couples 6-9 months or even longer to conceive sometimes. If you haven't been able to conceive after 12 cycles then it's time to investigate with your doctor but you're a long way off from that now.
With 25 day cycles, you should ovulate around day 11 and you would be potentially fertile 3 days before and 1 day after (so day 8 to 12 ).Having sex every other day during that time frame gives you the best odds. Other than that, try to relax and enjoy the process of baby making. Nothing seems to slow down conception more than when a couple turns conception into chore and stop enjoying each other.
and alcohol if any body of you is doing it.
Your hormone levels are perfectly all right.
Ask your wife to remain lying after sex for at least 30 minutes after sex so that sperms get better chance to go in.
There is no need for any HSG
or anything other test at the moment.
Let nature help you and it would definitely do so.