Should I tell a suitor that I suffer from obsessive-compulsive disorder and bipolar depression, and their physical effects, and when is the appropriate time to do so?

The greatest cure for intrusive thoughts (waswas) is supplication (dua) and turning away from them. Seeking treatment from a psychiatrist is good, and it is preferable for the doctor to be a religious Muslim woman, while adhering to the Islamic legal guidelines. As for informing the suitor about these intrusive thoughts, there is a detailed explanation: if they are severe and lead to aversion and affect the purpose of marriage, then he must be informed about them before the marriage contract, and it is permissible to stipulate that no one else be informed. However, if the intrusive thoughts do not reach this extent and do not affect love and mercy, then there is no obligation to inform him about them.