2nd Miscarriage

I suffered a miscarriage in may after taking femara and an ovidrel shot with timed intercourse. This week I will be suffering another miscarriage because the sac did not develop as it should. This pregnancy was from an <a href="https://glowing.com/glow-fertility-program">IUI</a> and at this point I'm lost about which step to take next. All of my tests have come back normal and it could just be bad luck. Should I do another <a href="https://glowing.com/glow-fertility-program">IUI</a> or move ahead to <a href="https://glowing.com/glow-fertility-program">IVF</a>?