Is sex supposed to be painful? (Tmi)

Its always painful for me. Maybe because I'm petite and small/tight? Idk. We've been trying to conceive for awhile now, had a miscarriage and gonna start trying again soon, im 18. I want my rainbow baby. 🌈👶❤🙏😢 But yeah, i want to try every other day, while ovulating or not, but id be to sore to go at it or go at it for very long (BD, baby dance, for those who dont know what it means it means sex) and he'd most of the time have to use his hand to finish of and i hope back on while he releases, to TTC of course, and im sure this doesn't effect whether or not how accurate it is, but it would be nice to enjoy it a little more.. And i can never orgasm while having sex either. No idea what would help. Maybe lube? But our saliva works very well and lubey or such, ugh. If rather not have a pelvic exam. Anyone else have or had this problem and found a way to help or get over this? If so what is your secret, what to do? Does it mean there's something wrong with me?????