Anxiety and getting pregnant?

I am a 20 year old female.. Me and my partner of a long time are settling down and trying to have a baby now.

I'm having some Trouble with my anxiety etc.

First let me start off with.. I don't get my periods.. Ever.. I maybe get them 3-4 times a year maybe 5 if I'm lucky.. It ever used to be like this but since I was about 18 it started happening. I'm not going to lie.. When I was with an ex when I was 17 - 18 still, the condom broke 2-3 times and I was scared so I would take the plan b pill.. 2 out of those 3 times.. It happened in a week span so that week I took two of them. Now let me remind you that was about two year ago.. I understand they can make your periods messed up, but still?? I think I might have POS. 

I have this pain that's sometimes dull in my lower abdomen on the left and right side kind of where the ovaries are.. Most of the time it only hurts when me and my fiancé are having sex, but sometimes it hurts when I pee or am just standing there, any ideas on what that might be? 

Now on to my anxiety.. 

I have OCD really bad, and horrible anxiety in general. My biggest fear is toilets, or anything going near my vagina.. If I brush up against something that touches my pants I will panic.. I don't like toilets because I feel like if my pants or underwear or any part of me touches it.. I will either get pregnant by a random persons sperm... Or I will get some type of STD or even worse.. HIV/AIDS ... From what I understand that is IMPOSSIBLE.. But being a person with OCD like mine.. It's very real and possible to me. 

I have to wipe over and over a certain way just in case.. And wash my hands a certain way.. Going to the bathroom now days is just draining and tiring. 

We've been trying for a while to have a baby and it's just not working and I'm starting to lose hope :/.. My anxiety stresses me out to no end.. And I feel like there is no light at the end of the tunnel.. 

Does anyone have any advice or something :(

Thanks again for reading this ❤️