Hi all just wondering if anyone can help, I'm new to this and have no idea how it works and am in need of advise. Thing is I finished my period on Sunday (20/4/14) and my boyfriend and I had sex on Monday (21/4/14) and since Wednesday (23/4/14) I've been getting light cramping, lower back ache and I feel like I'm going to start my period again. Since I came off my birth control 3 months ago I've been getting really light cramping a few days after I finish my period. I never thought anything of it but it's making me feel uncomfortable this time. I'm really confused as I've always thought I ovulated 2 weeks after my I finish my period and have been trying to concieve according to that but no luck. Could that have changed due to birth control?