I've been married for four years and we still don't have a baby. My wife and I have been to various doctors but she still can't become pregnant.
If there’s an argument my wife tells me I’m useless. I’ve been called this so many times now I’ve lost count. I just keep quiet instead.
She also keeps checking my phone to see if I’m talking to any women, which I’m not, but I don’t know if I should continue in this marriage.
Name-calling can be hurtful and degrading. It seems your wife believes you’re the one who has a fertility problem. Has a doctor verified this?
If not then I suggest you visit a fertility clinic for proper investigations and recommendations. In the meantime why not talk to your wife about attending marriage counselling?