Vulva Discomfort and slight pink discharge

I have been having extreme discomfort down there. It started just about a month ago, after I moved in with my fiancée. We’ve been engaged for almost a year now and since we’ve been together we’ve never had sex until the day I moved in. We did the foreplay and all that and he put a condom on and when he stuck it in it hurt. We expected that since it had been over 2 years since I had done anything with anyone and my only other partner was below average for erect male organs and it stung a little when he stuck it in once but that was it, no more pain after that. Well for me and my fiancée it hurt every time he thrusted in me so we tried again and again for a week to see if it would hurt less but it still hurt and when I went to the bathroom that week, I had a slight pink discharge. It also stung a little when I went to the bathroom and I was really itchy down there. He thought it was from me tearing because I’m too tight and he’s a bit bigger than average (7 ½ inches). I thought that too and maybe I was having a bad reaction to the condoms he bought (Trojan Magnum). I stared my period at the end of our first week living together so we didn’t try anything for about 4 or 5 days. I had little to no blood that day and we wanted to see if it still hurt and it did so we waited about 4 days before we tried again. I did some research into different positions that would hurts less and we tried about 5 of them but it still hurt. He bought different condoms this time (Trojan extended pleasures) and that helped and we successfully had sex with no pain. Sometimes there still is a slight pinching when we do have sex but nothing bad. The burning sensation started back up again with this almost orgasmic feeling when I go to the bathroom and now I sometimes have a milky white discharge after I go. Also my clit is tingly afterwards too, I had that feeling when I was younger and it went away after a couple minutes, I tried to masturbate the tingly away (that has helped before) but it didn’t help or mad it worse. I’m also having this frequent urge to go to the bathroom and when I do very little comes out. All those feelings normally don’t last all day and will go away after a few hours and won’t come back until after a day or may last all day. I haven’t changed my diet, I don’t smoke or drink and I don’t take any medications. We both have been checked for STDs and we are both clean. I don’t know what could be wrong.