Hi Please Help Me.. I Got My Period Last May

Hi please help me.. I got my period last May 24 and that day I also took a pill called Diane 35 my period last for 5days May 28. We had vacation with my husband from May 30-June 5 and active on sex from the May 30 all inside no condoms, etc. I stopped taking pills by June 6 and in June 10 got my period that lasts 5days. After a week June 22 until now I feel cramps on my lower back. I got spotting brownish spot now but too light and didnt need to use pads just panty liner. Am I pregnant then?