Cramping during fertile window

Nikki
To glow my fertile window began on Monday 10/27 that same day me and my boyfriend had sex 3 times. Every single time he came inside me. This is the first month we are ttc. Also my cm was Wet and Clear.  Now 2  days later  I'm having  slight cramping on my right side along with constipation. What do you think this is? Maybe ovulation?