Yes, you could be pregnant, but it may be an ectopic pregnancy, especially if the cramping is as bad as you said. If you are still having this severe cramping you need to see the Dr.
You may also have miscarried or had an infection, either way yuou nstill need to see the dr & get checked. Even if it was ectopic & "expelled" itself you need to have a dr make sure that youy don't need a d&c or anything & that all is ok for yuou to keep ttc.
Good luck & if you're not pregnant, the best way to fall is to relax, have a night away or out & a few drinks, just enough to relax you & you might get a nice surprise, but the main thing is to relax & enjoy each other, have some fun don't make it a job to have tome out & a few drinks so that you relax in order to fall. Ok!!??