Praying I Am Pregnant!!!!

Hello everyone. I am new to this kind of thing. I don't really do internet that often. I have been reading through some of the forum questions and answers and it seems like a lot of people give great advice and answers so I figured that I would try to see what people think about my situation. I am a 41 year old female that has always wanted a child. I have never been prenant and never have been on birth control.. I have had exploratory surgery back in 1999 and was told that I had some small tumors that were removed during the surgery. Since then to my knowledge I have had no issues. I had lung surgery in OCT last year. After the surgery I had cycles every 14 to 17 days. In March I went to the doc and he put me on progesterone. I had a 28 days cycle which was great I thought. My last Cycle was April 10th. I used an ovulation kit to try to determin when I would ovulate according the test I ovulated on or about the 25th of April. My next cycle should have started on or about the 7th or 8th of May. On the 12 of May in the morning and late in the evening, also on the 13th in the evening and the 14th in the morning, I had some brown spotting but only when I wiped (Sorry if TMI), nothing ever showed on the pad or liner I was wearing because I thought my cycle was starting late. Needless to say I still have no cycle and I have had a negative HTP as well as a negative BT. Has anyone else gone through the same thing and actually have been pregnant.