I have a hard time getting wet 😩

Gracie
My boyfriend and I are in a super serious, loving and healthy relationship. We've been dating for a year and a half and having sex for probably a year and 4 months. At first everything was good and amazing, but these past 3 or so months I have been having an impossible time trying to get wet, or staying wet if I do. It just makes the sex bad and lately, neither one of us has had a very big sex drive because of it. I'm on birth control and he uses condoms. I feel like the condoms might have something to do with drying me out, but I also got the extra lubricated kind. It still doesn't work. I dot. Wanna stop using them though because we're so paranoid. I'm wondering if any of you know the reason why I can't get or stay wet, and if you had any recommendations for lube that I should get. That shits expensive so I wanna make sure it's worth it 😂 thank you all so much! 
Ps he's on vacation right now for a few more days and I would REALLY like to surprise him when he gets back. So any tips at all would be wonderful!!!