Sever painful sex

Can anyone please help me i feel so depressed right now. I’ve been with my boyfriend for almost 2 months now and the pain I experience during sex is unbearable. I’ve been tested for everything and it’s only ever come back as thrush (yeast infection) which I keep getting treated for. The pain is almost like a stretching, sore, stinging pain at the entrance of my vagina, sometimes I bleed after/during sex as well. My boyfriend had for a massive dick like massive, so im wondering if that could have something to do with it? Idk what to do anymore im so depressed about it, I’ve been the doctors and they don’t seem to say or do much. My bf has just been away for 2 weeks and I thought I may have ‘healed’ in that time and we were so excited to have sex again, but yet again I was in so much pain and now im extremely disappointed and upset. I just thought this time might be different. In don’t wanna be that person who can’t have sex anymore😭 can anyone please help me