Can GA be a bad choice ?
Commercial aspects aside, I can't recall any circumstances were going around can be a bad choice. The price for it is a longer flight time, and may be more traffic in the circuit...
But if for any reason you don't feel like it'll be fine, you can interrupt the approach any time. Even if there was enough space to land behind the preceding A/C, the additional stress generated by your un-ease can have safety relevant impact.
You can go around as many times as you want, but you can't fail that many landings...