Is this a sign?

So my husband and i have worked things out after 9 months of separation. We are still madly in love with each other even through our divorce process so we cancelled everything attorneys and all. Well since we've been back together ummmm we've been humping like rabbits. We took a 2 day break thinking my body is sore and nipples are sensitive because of it but its gotten worse day by day. My af isnt due for another 11 days. My body is so weak and sore and my nipples are REALLY REALLY tender and now hurt. Ive taken a nice hot bath and tried to relax but didn't make things any better. Is this possibly a sign of pregnancy or something??? Idk if this matters but my son has been soooo clingy lately and he just turned 3 the 6th.