I think she's coming !!!! how do I know they are contractions! !!! Please

I will be 41 :/
Short Luteal Phase?
I've just started temping because I believe that the reason I haven't had a BFP yet, after 20 months, is because I believe I may have a Luteal Phase Defect.
Things I never thought I'd say...
Until I became a mom:
Yesterday I went out with my boyfriend went to watch a movie, me and him don't live together yet. but point is yesterday when he was dropping me off his like sleep over at my house witch the mom and dad lives. I said no,
his response was why is everyone deciding or making choices for you and their going to do the same with the baby, when I know that's not true. what he thinks is that my mom tells me not to sleep over. So he left all mad. and I felt in my heart that he went on and cheated on me...
They will feel like period cramps. They will be in a pattern. Any kind of pattern and they will come and go. Your stomach might get hard with them or it might not. They will alter your breathing. So you might have to stop and breath through them even if they aren't painful