First off, you are definitely NOT alone in this! There are entire organizations and programs dedicated to fixing this issue (see if your school has any "Women in Engineering" type programs, because they are probably the best ones to ask for advice).
In my own experience as a past engineering student, this was sometimes an issue in my classes and I would hear stories from female friends at internships as well. What helps is that as I grew older, I became more knowledgeable and therefore more confident and assertive in my ideas. I truly believe that time and experience will help with you as well.
Something that can also help is that when you are job searching, keep an eye out for how many women work at the company and how many women hold leadership positions there. It may help you feel less alone and give you a mentor for situations like this.
I'd also recommend reading the link below as well since it provides some really helpful advice on what to do:
Lillian recommends the following next steps:
- Read the article here: https://targetjobs.co.uk/career-sectors/engineering/advice/459763-top-female-engineers-give-students-their-tips-for-graduate-career-success
- Find a mentor to ask for advice and share your experiences with.
- Find "Women in Engineering" programs at your school.
- Know that time and experience will help you grow more confident and assertive.