No worries, there is no harm in asking.
The Q in LGBTQ+ stands for "Questioning", the idea being that you are questioning what your sexuality is. The rule of thumb with labels is that you use the one that feels most appropriate/comfortable for you. So if you're looking for a word, questioning is a good one, but don't feel pressured to pick anything or sort anything out. You do what feels right. If you previously assumed you were straight (or gay, bi, etc) but are now questioning it, you could also say "straight but questioning". Whatever works or makes sense!