Yes, you should seek help. On one hand, I am reluctant to characterize your problem as something “major” because it makes it seem as if it is an impossible problem to solve. It is not. On the other hand, any time someone has thoughts of suicide, it is a serious matter. Seeking professional help is both wise and necessary. I would strongly recommend it.
I am not familiar with European mental health systems but in the American system, individuals without health insurance and with limited incomes can receive treatment at local community mental health centers. I would recommend checking with the Department of Health to see what services you may be eligible for. In addition, in the United States all college students have free access to university health and mental health services. This may also be true of colleges in Europe. Check with someone at the school to see what services you may be eligible for.
I find it remarkable that even though you have been suffering you are on the verge of major educational success. It must have been difficult for you to focus on your studies and yet you managed to do so. This demonstrates a trait often associated with success in life, which is resilience. I wish you continued success.
Finally, I’m sorry to hear you have been suffering for so long. You need and deserve help. I hope that you are able to receive it. Please take care.