Sexual problem. Hv to use lube everytym?

I hv completed one n half year of marriage...but still can't intercoure with husband due to pain n tearing like feeling.... I went to a gynae but she said that it may b psychological or due to dryness....so there is no need of any test...  I tried sum lube...den it was a little easy for me....but husband says he feels like he is hitting a wall My married lyf is just ruining....should I go for another gynae ? Is it cureable or not? Or I hv to use lube  everytym? When its forply evrythng is normal but when it comes to intercourse I don't know what happens to me.... Once when we used lube ,I feel pain at vaginal opening but when it was completely in.... I ddnt feel ny pain Pls suggest me.... so dat we can live our life better n normal