In the years on this path I have found many who believe they are cursed. Many have not been, but the belief itself is powerful enough to cause the 'signs of being cursed'. I haven't a clue where you stand in this, so I will just give you some advice.
Cleanse, ground, center, protection spells or shields.
Mind over matter, convince yourself you are not cursed. Yes you can actually do that.
Meditation, meditate on if you are cursed or not, this takes time an patience. It will help you determine the nature of the curse and who may have done it.
Divination can help you determine who, when, why, where, etc. You must not go into the divination session knowing or suspecting any of the answers, if you do, you can alter the reading and confuse the truth with your own suspicions.
Cleanse, ground, center, protect.
Create a charm to ward of such things.